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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 40602.1-2021 |
Antennas and reception systems for radio interference—Part 1: Basic measurement—Method for far field measuring in microwave anechoic chamber 天线及接收系统的无线电干扰 第1部分：基础测量 天线方向图的室内远场测量方法 |
China National Standards echo |
 English PDF |
| GB/T 40602.2-2021 |
Antennas and reception systems for radio interference—Part 2:Basic measurement—Method for near field measuring high gain antenna pattern in microwave anechoic chamber 天线及接收系统的无线电干扰 第2部分：基础测量 高增益天线方向图室内平面近场测量方法 |
China National Standards echo |
English PDF |
| GB/T 40730-2021 |
Non-destructive testing -- Measuring thickness by electromagnetic ultrasonic pulse-echo 无损检测 电磁超声脉冲回波式测厚方法 |
China National Standards echo |
English PDF |
| GB/T 39282-2020 |
Non-destructive testing—Testing method for pulse-echo testing using electromagnetic acoustic transducer (EMAT) techniques 无损检测 电磁声换能器（EMAT）技术脉冲回波检测方法 |
China National Standards echo |
English PDF |
| GB/T 6730.34-2017 |
Iron ores—Determination of tin content—Pyrocatechol violet cetyl trimet hylamine bromide spectrophotometric method 铁矿石 锡含量的测定 邻苯二酚紫-溴化十六烷基三甲胺分光光度法 |
China National Standards echo |
English PDF |
| GB/T 17626.22-2017 |
Electromagnetic compatibility (EMC)—Testing and measurement techniques—Radiated emissions and immunity measurements in fully anechoic rooms（FARs） 电磁兼容 试验和测量技术 全电波暗室中的辐射发射和抗扰度测量 |
China National Standards echo |
English PDF |
| GB/T 27992.3-2016 |
Instruments for water-depth measurement—Part 3: echo sounder 水深测量仪器 第3部分：超声波测深仪 |
China National Standards echo |
English PDF |
| GB/T 32524.1-2016 |
Acoustics—Determination of sound power level and directivity character of power capacitor unit using sound pressure—Part 1: Precision method for hemi-anechoic rooms 声学 声压法测定电力电容器单元的声功率级和指向特性 第1部分：半消声室精密法 |
China National Standards echo |
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 echo |
English PDF |
| GB/T 32292-2015 |
Vacuum techology—Ferrofluid rotary feedthroughs—Generic specification 真空技术 磁流体动密封件 通用技术条件 |
China National Standards echo |
English PDF |
| GB/T 1859.3-2015 |
Reciprocating internal combustion engines—Measurement of sound power level using sound pressure—Part 3: Precision methods for hemi-anechoic rooms 往复式内燃机 声压法声功率级的测定 第3部分：半消声室精密法 |
China National Standards echo |
English PDF |
| GB/T 28880-2012 |
Non-destructive testing - Evaluating performance characteristics of ultrasonic pulse-echo testing systems without the use of electronic measurement instruments 无损检测 不用电子测量仪器对脉冲反射式超声检测系统性能特性的评定 |
China National Standards echo |
English PDF |
| GB 50826-2012 |
Technical code for construction of electromagnetic wave anechoic enclosure 电磁波暗室工程技术规范 |
China National Standards echo |
English PDF |
| GB 50800-2012 |
Technical code for anechoic and semi-anechoic rooms 消声室和半消声室技术规范 |
China National Standards echo |
English PDF |
| GB/T 14369-2011 |
Acoustics - Measurement methods of insertion loss，echo reduction and sound absorption coefficient for underwater acoustical material samples 声学 水声材料样品插入损失、回声降低和吸声系数的测量方法 |
China National Standards echo |
English PDF |
| GB/T 28037-2011 |
Information techology - General specification for projectors 信息技术 投影机通用规范 |
China National Standards echo |
English PDF |
| GB/T 12688.8-2011 |
Test method of styrene for industrial use - Part 8：Determination of content of inhibitor（p-tert-butylcatechol）- Spectrophotometric method 工业用苯乙烯试验方法 第8部分：阻聚剂(对-叔丁基邻苯二酚）含量的测定 分光光度法 |
China National Standards echo |
English PDF |
| GB/T 23960-2009 |
Catechol for industrial use 工业用邻苯二酚 |
China National Standards echo |
English PDF |
| GB/T 23908-2009 |
Non-destructive testing - Practice for ultrasonic pulse-echo straight-beam testing by the contact method 无损检测 接触式超声脉冲回波直射检测方法 |
China National Standards echo |
English PDF |
| GB/T 8016-2009 |
Marine echo-sounding equipment 船用回声测深设备 |
China National Standards echo |
English PDF |
| GB/T 11344-2008 |
Non-destructive testing - Practice for measuring thickness by ultrasonic pulse-echo contact method 无损检测 接触式超声脉冲回波法测厚方法 |
China National Standards echo |
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 echo |
English PDF |
| GB/T 6020-2008 |
Butadiene for industrial use - Determination of tert-butyl-catechol (TBC) 工业用丁二烯中特丁基邻苯二酚(TBC)的测定 |
China National Standards echo |
English PDF |
| GB/T 13748.2-2005 |
Chemical analysis methods of magnesium and magnesium alloys Determination of tin content Pyrocatechol violet spectrophotometric method 镁及镁合金化学分析方法 锡含量的测定 邻苯二酚紫分光光度法 |
China National Standards echo |
English PDF |
| GB/T 17192.5-2000 |
Information technology--Computer graphics--Interfacing techniques for dialogues with graphical devices(CGI)--Functional specification--Part 5:Inputand echoing 信息技术 计算机图形 与图形设备会话的接口技术(CGI) 功能说明 第5部分:输入和应答 |
China National Standards echo |
English PDF |
| GB/T 9541-1988 |
2400 bits per second duplex modem using the echo cancellation technique standardized for use on the general switched telephone network and on point-to-point 2 wire leased telephone-type-circuits 在普通电话交换网和点对点二线租用电话型电路上使用标准化的回波抵消技术的2400比特/ 秒双工调制解调器 |
China National Standards echo |
English PDF |
| GB/T 7623-1987 |
Automatic answering equipment and/or parallel automatic calling equipment on the general switched telephone network， including procedures for bling of echo control devices for both manually and automatically established calls 在电话自动交换网上的自动应答设备和(或)并行自动呼叫设备， 包括人工和自动建立呼叫时使回波控制装置停止工作的规程 |
China National Standards echo |
English PDF |
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