China levels, GB Standards List

China "levels," GB Standards List:

Standard Code	Standard Title	Standard Class	Order
GB/T 44051-2024	Non-destructive testing of welds-Phase-controlled array ultrasonic testing of thin-walled steel components-Acceptance levels {译} 焊缝无损检测-薄壁钢构件相控阵超声检测-验收等级	China National Standards levels,	English PDF
GB/T 34877.2-2023	Industrial fans - Determination of fan sound power levels under standard laboratory conditions - Part 2: Reverberation chamber method {译} 工业风机标准实验室条件下风机声功率级的测定第2部分：混响室法	China National Standards levels,	English PDF
GB/T 34877.1-2023	Industrial fans - Determination of fan sound power levels under standard laboratory conditions - Part 1: General requirements {译} 工业风机标准实验室条件下风机声功率级的测定第1部分：通用要求	China National Standards levels,	English PDF
GB 43630-2023	Tower and rack server energy efficiency limits and energy efficiency levels {译} 塔式和机架式服务器能效限定值及能效等级	China National Standards levels,	English PDF
GB/T 28869.3-2023	Magnetic cores made of soft magnetic materials - Measurement methods - Part 3: Magnetic properties at high excitation levels {译} 软磁材料制成的磁心测量方法第3部分：高励磁水平下的磁特性	China National Standards levels,	English PDF
GB/T 28869.2-2023	Magnetic cores made of soft magnetic materials - Methods of measurement - Part 2: Magnetic properties at low excitation levels {译} 软磁材料制成的磁心测量方法第2部分：低励磁水平下的磁特性	China National Standards levels,	English PDF
GB/T 11345-2023	Weld non-destructive testing Ultrasonic testing technology, testing levels and assessments {译} 焊缝无损检测超声检测技术、检测等级和评定	China National Standards levels,	English PDF
GB/T 43073-2023	Pneumatics - Test method for measuring sound pressure levels of exhaust mufflers {译} 气动测量排气消声器声压级的试验方法	China National Standards levels,	English PDF
GB/T 4798.4-2023	Classification of environmental conditions Classification of environmental parameter groups and their severity levels Part 4: Stationary use in places without weather protection {译} 环境条件分类环境参数组分类及其严酷程度分级第4部分：无气候防护场所固定使用	China National Standards levels,	English PDF
GB/T 13277.1-2023	Compressed air - Part 1: Pollutant purification levels {译} 压缩空气第1部分：污染物净化等级	China National Standards levels,	English PDF
GB/T 42581-2023	Information Technology Services - Evaluation Criteria for Data Center Business Continuity Levels {译} 信息技术服务数据中心业务连续性等级评价准则	China National Standards levels,	English PDF
GB/T 42468.1-2023	Specifications for rescue and restoration of paper archives Part 1: Classification of damage levels {译} 纸质档案抢救与修复规范第1部分：破损等级的划分	China National Standards levels,	English PDF
GB/T 1094.101-2023	Power transformers - Part 101: Determination of sound levels - Application guidelines {译} 电力变压器第101部分：声级测定应用导则	China National Standards levels,	English PDF
GB/T 3222.2-2022	Acoustics—Description, measurement and assessment of environmental noise—Part 2: Determination of sound pressure levels 声学环境噪声的描述、测量与评价第2部分：声压级测定	China National Standards levels,	English PDF
GB/T 4854.3-2022	Acoustics—Reference zero for the calibration of audiometric equipment—Part 3：Reference equivalent threshold vibratory force levels for pure tones and bone vibrators 声学校准测听设备的基准零级第3部分: 骨振器纯音基准等效阈振动力级	China National Standards levels,	English PDF
GB/T 17248.1-2022	Acoustics—Noise emitted by machinery and equipment—Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions 声学机器和设备发射的噪声测定工作位置和其他指定位置发射声压级的基础标准使用导则	China National Standards levels,	English PDF
GB/Z 42244-2022	Space environment. Procedure for obtaining worst-case and confidence levels of the Earth's radiation belt fluence using quasi-dynamic models {译} 空间环境利用准动态模型获得地球辐射带注量的最劣情况和置信水平的程序	China National Standards levels,	English PDF
GB/T 42254-2022	Ice regime levels in the Bohai Sea and the northern part of the Yellow Sea {译} 渤海和黄海北部冰情等级	China National Standards levels,	English PDF
GB/T 1094.10-2022	Power transformers - Part 10: Determination of sound levels {译} 电力变压器第10部分：声级测定	China National Standards levels,	English PDF
GB/T 18663.4-2022	Mechanical construction of electronic equipment - Tests for metric and imperial series - Part 4: Combinations of performance levels for modular cabinets {译} 电子设备机械结构　公制系列和英制系列的试验　第4部分：模数机柜的性能等级组合	China National Standards levels,	English PDF
GB/T 41116-2021	Non-destructive testing of welds—Time-of-flight diffraction technique (TOFD)—Acceptance levels 焊缝无损检测衍射时差技术（TOFD）验收等级	China National Standards levels,	English PDF
GB/T 40734-2021	Non-destructive testing of welds—Phased array ultrasonic testing(PAUT)—Acceptance levels 焊缝无损检测相控阵超声检测验收等级	China National Standards levels,	English PDF
GB/T 39095-2020	Aerospace—Hydraulic fluid components—Expression of particulate contamintion levels 航空航天液压流体零部件颗粒污染度等级的表述	China National Standards levels,	English PDF
GB/T 39157-2020	Classification and definition of the technology readiness levels for targets 靶材技术成熟度等级划分及定义	China National Standards levels,	English PDF
GB/T 37910.2-2019	Non-destructive testing of welds — Acceptance levels for radiographic testing — Part 2: Aluminium and its alloys 焊缝无损检测射线检测验收等级第2部分: 铝及铝合金	China National Standards levels,	English PDF
GB/T 37910.1-2019	Non-destructive testing of welds—Acceptance levels for radiographic testing—Part 1:Steel,nickel,titanium and their alloys 焊缝无损检测射线检测验收等级第1部分：钢、镍、钛及其合金	China National Standards levels,	English PDF
GB/T 37033.1-2018	Information security technology—Technical requirements for cryptographic application for radio frequency identification systems—Part 1: Cryptographic protection framework and security levels 信息安全技术-射频识别系统密码应用技术要求-第1部分：密码安全保护框架及安全级别	China National Standards levels,	English PDF
GB/T 37264-2018	Classification and definition of the technology readiness levels for new materials 新材料技术成熟度等级划分及定义	China National Standards levels,	English PDF
GB/T 17248.2-2018	Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections 声学-机器和设备发射的噪声-在一个反射面上方可忽略环境修正的近似自由场测定工作位置和其他指定位置的发射声压级	China National Standards levels,	English PDF
GB/T 17248.3-2018	Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions applying approximate environmental corrections 声学-机器和设备发射的噪声-采用近似环境修正测定工作位置和其他指定位置的发射声压级	China National Standards levels,	English PDF
GB/T 17248.5-2018	Acoustics—Noise emitted by machinery and equipment—Determination of emission sound pressure levels at a work station and at other specified positions applying accurate environmental corrections 声学-机器和设备发射的噪声-采用准确环境修正测定工作位置和其他指定位置的发射声压级	China National Standards levels,	English PDF
GB/T 36301-2018	Pre-processing product levels for spaceborne hyperspectral imaging data 航天高光谱成像数据预处理产品分级	China National Standards levels,	English PDF
GB/T 6378.4-2018	Samling procedures for inspection by variables—Part 4: Procedures for assessment of declared quality levels for mean 计量抽样检验程序第4部分：对均值的声称质量水平的评定程序	China National Standards levels,	English PDF
GB/T 11346-2018	Radiograpial testing for aluminum alloy castings—Defect levels 铝合金铸件射线照相检测缺陷分级	China National Standards levels,	English PDF
GB/T 6881.2-2017	Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for small movable sources in reverberant fields—Comparison method for a hard-walled test room 声学声压法测定噪声源声功率级和声能量级混响场内小型可移动声源工程法硬壁测试室比较法	China National Standards levels,	English PDF
GB/T 34877.3-2017	Industrial fans—Determination of fan sound power levels under standardized laboratory conditions—Part3:Enveloping surface methods 工业风机标准实验室条件下风机声功率级的测定第3部分：包络面法	China National Standards levels,	English PDF
GB/T 34834-2017	Acoustics—Framework for calculating a distribution of sound exposure levels for impulsive sound events for the purposes of environmental noise assessment 声学环境噪声评价中脉冲声事件暴露声级分布的计算方法	China National Standards levels,	English PDF
GB/T 34388-2017	Foundry machinery—Noise measurement method of sound power levels 铸造机械噪声声功率级测量方法	China National Standards levels,	English PDF
GB/T 33981-2017	Standard practice for the measurement of sound pressure levels on high-voltage alternating current circuit-breakers 高压交流断路器声压级测量的标准规程	China National Standards levels,	English PDF
GB/T 1859.4-2017	Reciprocating internal combustion engines—Measurement of sound power levels using sound pressure—Part 4:Survey method using a reference sound source 往复式内燃机声压法声功率级的测定第4部分：使用标准声源简易法	China National Standards levels,	English PDF
GB/T 35673-2017	Industrial communication networks—Network and system security—System security requirements and security levels 工业通信网络网络和系统安全系统安全要求和安全等级	China National Standards levels,	English PDF
GB/T 18039.4-2017	Electromagnetic compatibility—Environment—Compatibility levels in industrial plants for low-frequency conducted disturbances 电磁兼容环境工厂低频传导骚扰的兼容水平	China National Standards levels,	English PDF
GB/T 3768-2017	Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Survey method using an enveloping measurement surface over a reflecting plane 声学声压法测定噪声源声功率级和声能量级采用反射面上方包络测量面的简易法	China National Standards levels,	English PDF
GB/T 18039.3-2017	Electromagnetic compatibility—Environment—Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems 电磁兼容环境公用低压供电系统低频传导骚扰及信号传输的兼容水平	China National Standards levels,	English PDF
GB/T 1094.3-2017	Power transformers—Part 3:Insulation levels,dielectric tests and external clearances in air 电力变压器第3部分:绝缘水平、绝缘试验和外绝缘空气间隙	China National Standards levels,	English PDF
GB/T 20438.5-2017	Functional safety of electrical/electronic/programmable electronic safety-related systems—Part 5: Examples of methods for the determination of safety integrity levels 电气/电子/可编程电子安全相关系统的功能安全第5部分：确定安全完整性等级的方法示例	China National Standards levels,	English PDF
GB/T 17625.9-2016	Electromagnetic compatibility—Limits—Signaling on low-voltage electrical installations—Emission levels, frequency bands and electromagnetic disturbance levels 电磁兼容限值低压电气设施上的信号传输发射电平、频段和电磁骚扰电平	China National Standards levels,	English PDF
GB/T 33214-2016	Laser-arc hybrid welding joints of steels, nickel and nickel alloys—Quality levels for imperfections 钢、镍及镍合金的激光-电弧复合焊接接头缺欠质量分级指南	China National Standards levels,	English PDF
GB/T 33138-2016	levels and test method for storage and backup system 存储备份系统等级和测试方法	China National Standards levels,	English PDF
GB/T 32577-2016	Measurement procedures of magnetic field levels generated by electronic and electrical apparatus in the railway environment with respect to human exposure 轨道交通有人环境中电子和电气设备产生的磁场强度测量方法	China National Standards levels,	English PDF
GB/T 4854.9-2016	Acoustics—Reference zero for the calibration of audiometric equipment—Part 9: Preferred test conditions for the determination of reference hearing threshold levels 声学校准测听设备的基准零级第9部分：确定基准听阈级的优选测试条件	China National Standards levels,	English PDF
GB/T 3767-2016	Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Engineering methods for an essentially free field over a reflecting plane 声学声压法测定噪声源声功率级和声能量级反射面上方近似自由场的工程法	China National Standards levels,	English PDF
GB/T 6882-2016	Acoustics—Determination of sound power levels and sound energy levels of noise sources using sound pressure—Precision methods for anechoic rooms and hemi-anechoic rooms 声学声压法测定噪声源声功率级和声能量级消声室和半消声室精密法	China National Standards levels,	English PDF
GB/T 22715-2016	Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines 旋转交流电机定子成型线圈耐冲击电压水平	China National Standards levels,	English PDF
GB/T 14255-2015	Household sewing machines head—Method of sound power levels of noise emitted 家用缝纫机机头噪声声功率级的测试方法	China National Standards levels,	English PDF
GB/T 4854.6-2014	Acoustics―Reference zero for the calibration of audiometric equipment―Part 6: Reference hearing threshold levels for test signals of short duration 声学校准测听设备的基准零级第6部分：短时程测试信号的基准听阈	China National Standards levels,	English PDF
GB/T 30988-2014	Methods of genomic DNA extraction from plants with high levels of polyphenols 多酚类植物基因组DNA提取纯化及测试方法	China National Standards levels,	English PDF
GB/T 18039.9-2013	Electromagnetic compatibility - Environment - Compatibility levels for low-frequency conducted disturbances and signaling in public medium-voltage power supply systems 电磁兼容环境公用中压供电系统低频传导骚扰及信号传输的兼容水平	China National Standards levels,	English PDF
GB/T 29712-2013	Non-destructive testing of welds - Ultrasonic testing - Acceptance levels 焊缝无损检测超声检测验收等级	China National Standards levels,	English PDF
GB/T 11345-2013	Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and assessment 焊缝无损检测超声检测技术、检测等级和评定	China National Standards levels,	English PDF
GB/T 7333-2012	Fixed capacitors for use in electronic equipment - Part 2-1: Blank detail specification - Fixed metallized polyethylene-terephthalate film dielectric d.c.capacitors - Assessment levels E and EZ 电子设备用固定电容器第2-1部分：空白详细规范金属化聚乙烯对苯二甲酸酯膜介质直流固定电容器评定水平E和EZ	China National Standards levels,	English PDF
GB/T 10191-2011	Fixed capacitors for use in electronic equipment - Part 16-1: Blank detail specification：Fixed metallized polypropylene film dielectric d.c.capacitors - Assessment levels E and EZ 电子设备用固定电容器第16-1部分：空白详细规范金属化聚丙烯膜介质直流固定电容器评定水平E和EZ	China National Standards levels,	English PDF
GB/T 27760-2011	Test method for calibrating the z-magnification of an atomic force microscope at subnanometer displacement levels using si (111) monatomic steps 利用Si（111）晶面原子台阶对原子力显微镜亚纳米高度测量进行校准的方法	China National Standards levels,	English PDF
GB/T 26953-2011	Non-destructive testing of welds - Penetrant testing of welds - Acceptance levels 焊缝无损检测焊缝渗透检测验收等级	China National Standards levels,	English PDF
GB/T 26952-2011	Non-destructive testing of welds - Magnetic particle testing of welds - Acceptance levels 焊缝无损检测焊缝磁粉检测验收等级	China National Standards levels,	English PDF
GB/T 13236-2011	Petroleum and liquid petroleum products - Equipment for measurement of liquid levels in storage tanks - Manual method 石油和液体石油产品储罐液位手工测量设备	China National Standards levels,	English PDF
GB 2761-2011	National Food Safety Standards – Maximum levels of mycotoxins in foods 食品安全国家标准食品中真菌毒素限量	China National Standards levels,	English PDF
GB/T 25982-2010	Permissible levels and test methods of bus internal noise 客车车内噪声限值及测量方法	China National Standards levels,	English PDF
GB/T 24961-2010	Refrigerated light hydrocarbon fluids - Measurement of liquid levels in tanks containing liquefied gases - Float-type level gauges 冷冻轻烃流体液化气储罐内液位的测量浮子式液位计	China National Standards levels,	English PDF
GB/T 24960-2010	Refrigerated light hydrocarbon fluids - Measurement of liquid levels in tanks containing liquefied gases - Electrical capacitance gauges 冷冻轻烃流体液化气储罐内液位的测量电容液位计	China National Standards levels,	English PDF
GB/T 24734.11-2009	Technical product documentation - Digital product definition data practices - Part 11: levels of geometrical detail 技术产品文件数字化产品定义数据通则第11部分：模型几何细节层级	China National Standards levels,	English PDF
GB/Z 24636.4-2009	Geometrical product specifications(GPS) - Statistical tolerance - Part 4: Statistical tolerance design based on given confidence levels 产品几何技术规范（GPS）统计公差第4部分：基于给定置信水平的统计公差设计	China National Standards levels,	English PDF
GB/T 6865-2009	Codes for levels of language proficiency and foreign language test grades 语种熟练程度和外语考试等级代码	China National Standards levels,	English PDF
GB/T 3222.2-2009	Acoustics - Description, measurement and assessment of environmental noise - Part 2: Determination of environmental noise levels 声学环境噪声的描述、测量与评价第2部分：环境噪声级测定	China National Standards levels,	English PDF
GB/T 23282-2009	Metal forming machinery - Noise measurement method of sound power levels 锻压机械噪声声功率级测量方法	China National Standards levels,	English PDF
GB/T 23281-2009	Metal forming machinery -noise measurement method of sound pressure levels 锻压机械噪声声压级测量方法	China National Standards levels,	English PDF
GB/T 17567-2009	Clearance levels for recycle and reuse of steel、aluminum、nickel and copper from nuclear facilities 核设施的钢铁、铝、镍和铜再循环、再利用的清洁解控水平	China National Standards levels,	English PDF
GB 5980-2009	Regulation on noise levels on board inland ships 内河船舶噪声级规定	China National Standards levels,	English PDF
GB/T 22715-2008	Impulse voltage withstand levels of form-wound stator coils for rotating a.c. machines 交流电机定子成型线圈耐冲击电压水平	China National Standards levels,	English PDF
GB/T 16306-2008	Re-inspection and re-test procedures for assessment of declared quality levels 声称质量水平复检与复验的评定程序	China National Standards levels,	English PDF
GB/T 2828.4-2008	Sampling procedures for inspection by attributes - Part 4: Procedures for assessment of declared quality levels 计数抽样检验程序第4部分：声称质量水平的评定程序	China National Standards levels,	English PDF
GB/T 6378.4-2008	Sampling procedures for inspection by variables - Part 4: Procedures for assessment of declared quality levels for mean 计量抽样检验程序第4部分:对均值的声称质量水平的评定程序	China National Standards levels,	English PDF
GB/T 2828.11-2008	Sampling procedures for inspection by attributes Part 11: Procedures for assessment of declared quality levels for small population 计数抽样检验程序第11部分: 小总体声称质量水平的评定程序	China National Standards levels,	English PDF
GB/T 4854.5-2008	Acoustics - Reference zero for the calibration of audiometric equipment- Part 5: Reference equivalent threshold sound pressure levels for pure tone in the frequency range 8 kHz to 16 kHz 声学校准测听设备的基准零级第5部分：8kHz-16kHz频率范围纯音基准等效阈声压级	China National Standards levels,	English PDF
GB/T 6882-2008	Acoustics - Determination of sound power levels of noise sources using pressure - Precision methods for anechoic and hemi-anechoic rooms 声学声压法测定噪声源声功率级消声室和半消声室精密法	China National Standards levels,	English PDF
GB/T 16538-2008	Acoustics - Determination of sound power levels of noise sources using sound pressure - Comparison method in situ 声学声压法测定噪声源声功率级现场比较法	China National Standards levels,	English PDF
GB/T 1094.101-2008	Power transformers - Part 10.1: Determination of sound levels - Application guide 电力变压器第10.1部分: 声级测定应用导则	China National Standards levels,	English PDF
GB/T 22087-2008	Arc-welded joints in aluminium and its alloys - Guidance on quality levels for imperfection 铝及铝合金的弧焊接头缺欠质量分级指南	China National Standards levels,	English PDF
GB/T 22085.2-2008	Electron and laser beam welded joints - Guidance on quality levels for imperfections - Part 2:Aluminium and its weldable alloys 电子束及激光焊接接头缺欠质量分级指南第2部分：铝及铝合金	China National Standards levels,	English PDF
GB/T 22085.1-2008	Electron and laser beam welded joints - Guidance on quality levels for imperfactions - Part 1:Steel 电子束及激光焊接接头缺欠质量分级指南第1部分：钢	China National Standards levels,	English PDF
GB 17888.1-2008	Safety of machinery - Permanent means of access to machinery - Part 1: Choice of a fixed means of access between two levels 机械安全进入机械的固定设施第1部分：进入两级平面之间的固定设施的选择	China National Standards levels,	English PDF
GB/T 4854.8-2007	Acoustics - Reference zero for the calibration of audiometric equipment - Part 8: Reference equivalent threshold sound pressure levels for pure tone and circumaural earphones 声学校准测听设备的基准零级第8部分：耳罩式耳机纯音基准等效阈声压级	China National Standards levels,	English PDF
GB/T 21229-2007	Acoustics - Determination of sound power levels of noise from air-terminal devices,air-terminal units,dampers and valves by measurement in a reverberation room 声学风道末端装置、末端单元、风道闸门和阀噪声声功率级的混响室测定	China National Standards levels,	English PDF
GB/T 17248.6-2007	Acoustics - Noise emitted by machinery and equipment - Engineering method for the determination of emission sound pressure levels in situ at the work station and at other specified positions using sound intensity 声学机器和设备发射的噪声声强法现场测定工作位置和其它指定位置发射声压级的工程法	China National Standards levels,	English PDF
GB/T 21111-2007	Projection in indoor rooms - Classification of transmitting projection screens and measurement of their transmitted luminance levels 室内放映透射放映银幕的分类和亮度测定	China National Standards levels,	English PDF
GB/T 21109.3-2007	Functional safety-Safety instrumented systems for the process industry sector - Part 3: Guidance for the determination of the required safety integrity levels 过程工业领域安全仪表系统的功能安全第3部分：确定要求的安全完整性等级的指南	China National Standards levels,	English PDF
GB/T 20438.5-2006	Functional safety of electrical/electronic/programmable electronic safety-related systems―Part 5: Examples of methods for the determination of safety integrity levels 电气/电子/可编程电子安全相关系统的功能安全第5部分: 确定安全完整性等级的方法示例	China National Standards levels,	English PDF
GB/T 14367-2006	Acoustics―Determination of sound power levels of noise sources―Guidelines for the use of basic standards 声学噪声源声功率级的测定基础标准使用指南	China National Standards levels,	English PDF
GB 50168-2006	Erection works of electrical installations Code for construction and acceptance of cable levels 电气装置安装工程电缆线路施工及验收规范	China National Standards levels,	English PDF
GB/T 20248-2006	Acoustics - Measurement of sound pressure levels in the interior of aircraft during flight 声学飞行中飞机舱内声压级的测量	China National Standards levels,	English PDF
GB/T 20246-2006	Acoustics - Determination of sound power levels of multisource industrial plants for evaluation of sound pressure levels in the environment - Engineering method 声学用于评价环境声压级的多声源工厂的声功率级测定工程法	China National Standards levels,	English PDF
GB/T 16404.3-2006	Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 3: Precision method for measurement by scanning 声学声强法测定噪声源声功率级第3部分：扫描测量精密法	China National Standards levels,	English PDF
GB/Z 19511-2004	Industrial，scientific and medical equipment(ISM)--Guidelines for emission levels within the bands designated by the ITU 工业、科学和医疗设备(ISM) 国际电信联盟(ITU)指定频段内的辐射电平指南	China National Standards levels,	English PDF
GB/T 4854.1-2004	Acoustics--Reference zero for the calibration of audiometric equipment--Part1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones 声学校准测听设备的基准零级第1部分:压耳式耳机纯音基准等效阈声压级	China National Standards levels,	English PDF
GB/T 19418-2003	Arc-welded joints in steel--Guidance on quality levels for imperfections 钢的弧焊接头缺陷质量分级指南	China National Standards levels,	English PDF
GB/T 1094.10-2003	Power transformers--Part 10: Determination of sound levels 电力变压器第10部分:声级测定	China National Standards levels,	English PDF
GB 1094.3-2003	Power transformers--Part 3: Insulation levels，dielectric tests and external clearances in air 电力变压器第3部分: 绝缘水平、绝缘试验和外绝缘空气间隙	China National Standards levels,	English PDF
GB/T 4129-2003	Acoustics--Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels 声学用于声功率级测定的标准声源的性能与校准要求	China National Standards levels,	English PDF
GB/T 18039.4-2003	Electromagnetic compatibility--Environment--Compatibility levels in industrial plants for low-frequency conducted disturbances 电磁兼容环境工厂低频传导骚扰的兼容水平	China National Standards levels,	English PDF
GB/T 18039.3-2003	Electromagnetic compatibility--Environment--Compatibility levels for low-frequency conducted disturbances and signalling in public low-voltage power supply systems 电磁兼容环境公用低压供电系统低频传导骚扰及信号传输的兼容水平	China National Standards levels,	English PDF
GB/T 6881.3-2002	Acoustics--Determination of sound power levels of noise sources-using sound pressure--Engineering methods for small，movable sources in reverberant fields--Part 2:Methods for special reverberation test rooms 声学声压法测定噪声源声功率级混响场中小型可移动声源工程法第2部分:专用混响测试室法	China National Standards levels,	English PDF
GB/T 6881.2-2002	Acoustics--Determination of sound power levels of noise sources--Engineering methods for small，movable sources in reverberant field--Part 1:Comparison method for hard-walled test rooms 声学声压法测定噪声源声功率级混响场中小型可移动声源工程法第1部分:硬壁测试室比较法	China National Standards levels,	English PDF
GB/T 6881.1-2002	Acoustics--Determination of sound power levels of noise sources using sound pressure--Precision methods for reverberation rooms 声学声压法测定噪声源声功率级混响室精密法	China National Standards levels,	English PDF
GB/T 18492-2001	Information technology--System and software inte-grity levels 信息技术系统及软件完整性级别	China National Standards levels,	English PDF
GB/Z 18039.2-2000	Electromagneticcompatibility -- Environment --Assessment of the emission levels in the power supply of industrial plants as regards low-frequency conducted disturbances 电磁兼容环境工业设备电源低频传导骚扰发射水平的评估	China National Standards levels,	English PDF
GB/T 17248.1-2000	Acoustics--Noise emitted by machinery and equipment--Guidelines forthe use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions 声学机器和设备发射的噪声测定工作位置和其他指定位置发射声压级的基础标准使用导则	China National Standards levels,	English PDF
GB/T 7584.2-1999	Acoustics--Hearing protectors--Part 2:Estimation of effective A-weighted sound pressure levels when hearing protectors are worn 声学护听器第2部分:戴护听器时有效的A计权声压级估算	China National Standards levels,	English PDF
GB/T 4854.4-1999	Acoustics--Reference zero for the calibration of audiometric equipment--Part 4:Reference levels for narrow-band masking noise 声学校准测听设备的基准零级第4部分:窄带掩蔽噪声的基准级	China National Standards levels,	English PDF
GB/T 17248.5-1999	Acoustics--Noise emitted by machinery and equipment--Measurement of emission sound pressure levels at a work station and at other specified positions--Method requiring environmental corrections 声学机器和设备发射的噪声工作位置和其他指定位置发射声压级的测量环境修正法	China National Standards levels,	English PDF
GB/T 17248.3-1999	Acoustics--Noise emitted by machinery and equipment--Measurement of emission sound pressure levels at a work station and at other specified positions--Survey method in situ 声学机器和设备发射的噪声工作位置和其他指定位置发射声压级的测量现场简易法	China National Standards levels,	English PDF
GB/T 17248.2-1999	Acoustics--Noise emitted by machinery and equipment--Measurement of emission sound pressure levels at a work station and at otherspecified positions--Engineering method in an essentially free field over a reflecting plane 声学机器和设备发射的噪声工作位置和其他指定位置发射声压级的测量一个反射面上方近似自由场的工程法	China National Standards levels,	English PDF
GB/T 16404.2-1999	Acoustics--Determination of sound power levels of noise sources using sound intensity--Part 2:Measurement by scanning 声学声强法测定噪声源的声功率级第2部分:扫描测量	China National Standards levels,	English PDF
GB/T 4854.3-1998	Acoustics--Reference zero for the calibration of audiometric equipment--Part 3:Reference equivalent threshold force levels for pure tones and bone vibrators 声学校准测听设备的基准零级第3部分:骨振器纯音基准等效阈力级	China National Standards levels,	English PDF
GB/T 16539-1996	Acoustics--Determination of sound power levels of noise sources using vibration velocity--Measurement for seal machinery 声学振速法测定噪声源声功率级用于封闭机器的测量	China National Standards levels,	English PDF
GB/T 3768-1996	Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using an enveloping measurement surface over a reflecting plane 声学声压法测定噪声源声功率级反射面上方采用包络测量表面的简易法	China National Standards levels,	English PDF
GB/T 3767-1996	Acoustics--Determination of sound power levels of noise sources using sound pressure--Engineering method in an essentially free field over a reflecting plane 声学声压法测定噪声源声功率级反射面上方近似自由场的工程法	China National Standards levels,	English PDF
GB/T 16404-1996	Acoustics--Determination of sound power levels of noise sources using sound intensity--Part 1:Measurement at discrete points 声学声强法测定噪声源的声功率级第1部分:离散点上的测量	China National Standards levels,	English PDF
GB/T 16402-1996	Acoustics--Reference equivalent threshold sound pressure levels for pure tones and insert earphones 声学插入式耳机纯音基准等效阈声压级	China National Standards levels,	English PDF
GB 9662-1988	Guideline on intervention levels and medical management in the event of radiological accident 电离辐射事故干预水平及医学处理原则	China National Standards levels,	English PDF
GB/T 9627-1988	Inductor and transformer cores for telecommunications--Part 3:Blank detail specification--Magnetic oxide cores for broad-band transformers--Assessment levels A and B 通信用电感器和变压器磁芯第三部分:空白详细规范宽带变压器用磁性氧化物磁芯评定水平 A和B (可供认证用)	China National Standards levels,	English PDF
GB/T 9068-1988	Determination of sound power levels for noise emitted by heating，ventilating and air conditioning equipments--Engineering method 采暖通风与空气调节设备噪声声功率级的测定工程法	China National Standards levels,	English PDF
GB 5979-1986	Regulation on noise levels on board sea-going ships 海洋船舶噪声级规定	China National Standards levels,	English PDF
GB 5044-1985	Classification of health hazard levels fromoccup-ational exposure to toxic substances 职业性接触毒物危害程度分级	China National Standards levels,	English PDF
GB/T 4215-1984	Determination of sound power levels of noise emitted by metal cutting machine tools 金属切削机床噪声声功率级的测定	China National Standards levels,	English PDF
GB/T 3238-1982	Acoustical levels and refrence quantities 声学量的级及其基准值	China National Standards levels,	English PDF

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