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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| HB 6167.21-2014(2017) |
Environmental conditions and test methods for airborne equipment of civil aircraft Part 21: Sensitivity test of induced signals {译} 民用飞机机载设备环境条件和试验方法 第21部分：感应信号敏感性试验 |
China Aviation Industry
Standards 21: |
 English PDF |
| YY 9706.221-2021 |
Medical electrical equipment - Part 2-21: Particular requirements for basic safety and essential performance of radiant warmers for infants {译} 医用电气设备 第2-21部分：婴儿辐射保暖台的基本安全和基本性能专用要求 |
China Pharmaceutics Industry
Standards 21: |
English PDF |
| YS/T 575.21-2020 |
Methods for chemical analysis of bauxite ores - Part 21: Determination of organic carbon content {译} 铝土矿石化学分析方法 第21部分：有机碳含量的测定 |
China Non-ferrous Metal Industry
Standards 21: |
English PDF |
| TB/T 2075.21-2020 |
Catenary components for electrified railways - Part 21: Tunnel horizontal suspension devices {译} 电气化铁路接触网零部件 第21部分：隧道水平悬挂装置 |
China Railway Transport Industry
Standards 21: |
English PDF |
| YD/T 2896.21-2015 |
(Intelligent Optical Distribution Network Interface Technical requirements - Part 21: SNMP based intelligent optical distribution network facilities and intelligent interface optical distribution network management system) 智能光分配网络 接口技术要求 第21部分：基于snmp的智能光分配网络设施与智能光分配网络管理系统的接口 |
China Telecommunication
Standards 21: |
English PDF |
| NB/T 20008.21-2015 |
Other material for pressurized water reactor nuclear power plants - Part 21: GH4169 alloy bars used for CRDM 压水堆核电厂用其他材料 第21部分：控制棒驱动机构用gh4169合金棒 |
China Energy industry
Standards 21: |
English PDF |
| NB/T 20009.21-2014 |
Welding material for pressurized water reactor nuclear power plants Part 21: Carbon steel covered electrodes for safety-related components 压水堆核电厂用焊接材料 第21部分：安全级设备用碳钢手工电弧焊焊条 |
China Energy industry
Standards 21: |
English PDF |
| YD/T 1576.21-2013 |
Test method of mobile station (including non UIM mobile station) for 800MHz/2GHz cdma2000 digital cellular mobile telecommunication network. Part 21:protocol conformance test. Essential signalling 800mhz/2ghz cdma2000数字蜂窝移动通信网设备测试方法 移动台（含机卡一体） 第21部分：协议一致性 基本信令 |
China Telecommunication
Standards 21: |
English PDF |
| NB/T 20007.21-2012 |
Stainless steel for pressurized water reactor nuclear power plants. Part 21: Martensitic stainless steel plates for use in making steam generator tube support plates 压水堆核电厂用不锈钢 第21部分：蒸汽发生器传热管支承用马氏体不锈钢板 |
China Energy industry
Standards 21: |
English PDF |
| DL/T 1151.21-2012 |
Analytical methods of scale and corrosion products in power plants. Part 21: Determiuation of metal-element contents. Inductively coupled plasma atomic emission spectroscopy (ICP-AES) 火力发电厂垢和腐蚀产物分析方法 第21部分：金属元素的测定 等离子发射光谱法 |
China Electricity & Power
Standards 21: |
English PDF |
| HG/T 2487-2011 |
Rubber threads-Methods of test(idt ISO 2321: 2006) 橡胶胶丝试验方法 |
China Chemical Industry
Standards 21: |
English PDF |
| QB/T 4096.21-2011 |
Performance of room heaters for household and similar purposes. Part 21: Particular requirements for convector heaters 家用和类似用途室内加热器的性能 第21部分：对流式加热器的特殊要求 |
China Light Industry
Standards 21: |
English PDF |
| TB/T 2075.21-2010 |
Fittings for overhead contact system in electrification railway. Part 21:Horizontal hang device in tunnels 电气化铁路接触网零部件 第21部分：隧道水平悬挂装置 |
China Railway & Train
Standards 21: |
English PDF |
| SN/T 2497.21-2010 |
Test method of import and export dangerous chemicals. Part 21:Agarose gel electrophoresis 进出口危险化学品安全试验方法 第21部分：琼脂糖凝胶电泳试验 |
China Import Export Inspection
Standards 21: |
English PDF |
| SN/T 2360.21-2009 |
Rules for the inspection of food additives for import and export. Part 21:Thickener 进出口食品添加剂检验规程 第21部分：增稠剂 |
China Import Export Inspection
Standards 21: |
English PDF |
| YS/T 575.21-2007 |
Methods for chemical analysis of bauxite Part 21:Determination of organic carbon content titrimetric method 铝土矿石化学分析方法 第21部分 有机碳含量的测定 滴定法 |
China YS-Non-ferrous Metal
Standards 21: |
English PDF |
| TB/T 2658.21-2007 |
Maintenance performance. Part 21:Ultrasonic testing of rail welds 工务作业第21部分：钢轨焊缝超声波探伤作业 |
China Railway & Train
Standards 21: |
English PDF |
| DL/T 502.21-2006 |
Analytical methods of steam and water in power plants. Part 21: Determination of chlorine residual (Colorimetric method) 火力发电厂水汽分析方法 第21部分: 残余氯的测定（比色法） |
China Electricity & Power
Standards 21: |
English PDF |
| TB/T 3103.21-2005 |
Cone-shaped bayonet ring couplings for rolling stock. Part 21:Meter-pipe intubatton straight couplings 机车车辆用锥面卡套式管接头 第21部分:表管插管直通管接头 |
China Railway & Train
Standards 21: |
English PDF |
| TB/T 3102.21-2005 |
Curved-face bayonet ring couplings for rolling stock. Part 21:Insert cone thread straight couplings 机车车辆用曲面卡套式管接头 第21部分:插管锥螺纹直通管接头 |
China Railway & Train
Standards 21: |
English PDF |
| JT/T 29.21-2004 |
Profressional technique requirements in the communications industry-Harbor. Part 21: Harbor baggagemen 交通行业职业技能要求 港口 第21部分 港口行李员 |
China Highway & Transportation
Standards 21: |
English PDF |
| DL/T 790.321-2002 |
Distribution automation using distribution line carrier systems. Part 3-21: Mains signalling requirements MV phase-to-phase isolated capacitive coupling devices 采用配电线载波的配电自动化 第321部分:配电线载波信号传输要求 中压绝缘电容型相相结合设备 |
China Electricity & Power
Standards 21: |
English PDF |
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