China National Standards

China PA GB Standards English PDF List


GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards;  We provide Chinese GB standards and English version GB standards  Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services.
  •  China "PA" GB Standards English PDF List:
  • Standard  Code Standard Title Standard Class Order
    GB/T 18309.1-2001 Fibre optic interconnecting devices and PAssive components--Basic test and measurement procedures--Part 1:General and guidance
    纤维光学互连器件和无源器件 基本试验和测量程序 第1部分:总则和导则
    China National Standards
    PA

    English PDF
    GB/T 18308.1-2001 Fiber optic adaptors--PArt 1:Generic specification
    纤维光学转接器 第1部分:总规范
    China National Standards
    PA

    English PDF
    GB 18306-2001 Seismic ground motion PArameter zonation map of China
    中国地震动参数区划图
    China National Standards
    PA

    English PDF
    GB 18208.2-2001 Post-earthquake field works--PArt 2:Safety assessment of buildings
    地震现场工作 第2部分:建筑物安全鉴定
    China National Standards
    PA

    English PDF
    GB/T 18290.5-2000 Solderless connections--PArt 5:Solderless press-in connections--General requirements,test methods and practical guidance
    无焊连接 第5部分:无焊压入式连接 一般要求、试验方法和使用导则
    China National Standards
    PA

    English PDF
    GB/T 18290.4-2000 Solderless connections--PArt 4:Solderless non-accessible insulation displacement connections--General requirements,test methods and practical guidance
    无焊连接 第4部分:不可接触无焊绝缘位移连接 一般要求、试验方法和使用导则
    China National Standards
    PA

    English PDF
    GB/T 18290.3-2000 Solderless connections--PArt 3:Solderless accessible insulation displacement connections--General requirements,test methods and practical guidance
    无焊连接 第3部分:可接触无焊绝缘位移连接 一般要求、试验方法和使用导则
    China National Standards
    PA

    English PDF
    GB/T 18290.2-2000 Solderless connections--PArt 2:Solderless crimped connections--General requirements, test methods and practical guidance
    无焊连接 第2部分:无焊压接连接 一般要求、试验方法和使用导则
    China National Standards
    PA

    English PDF
    GB/T 15237.1-2000 Terminology work--Vocabulary--PArt 1:Theory and application
    术语工作 词汇 第1部分:理论与应用
    China National Standards
    PA

    English PDF
    GB 9706.20-2000 Medical electrical equipment--PArt 2:Particular requirements for the safety of diagnostic andtherapeutic laser equipment
    医用电气设备 第2部分:诊断和治疗激光设备安全专用要求
    China National Standards
    PA

    English PDF
    GB 18282.1-2000 Sterilization of health care products--Chemical indicators--PArt 1:General requirements
    医疗保健产品灭菌 化学指示物 第1部分:通则
    China National Standards
    PA

    English PDF
    GB 18281.3-2000 Sterilization of health care products--Biological indicators--PArt 3:Biological indicators for moist heat sterilization
    医疗保健产品灭菌 生物指示物 第3部分:湿热灭菌用生物指示物
    China National Standards
    PA

    English PDF
    GB 18281.2-2000 Sterilization of health care products--Biological indicators--PArt 2:Biological indicators for ethylene oxide sterilization
    医疗保健产品灭菌 生物指示物 第2部分:环氧乙烷灭菌用生物指示物
    China National Standards
    PA

    English PDF
    GB 18281.1-2000 Sterilization of health care products--Biological indicators--PArt 1:General
    医疗保健产品灭菌 生物指示物 第1部分:通则
    China National Standards
    PA

    English PDF
    GB/T 16895.9-2000 Electrical installations of buildings--PArt 7:Requirements for special installations or locations--Section 707:Earthing requirements for the electrical installation of data processing equipment
    建筑物电气装置 第7部分:特殊装置或场所的要求 第707节:数据处理设备用电气装置的接地要求
    China National Standards
    PA

    English PDF
    GB/T 15153.2-2000 Telecontrol equipment and systems--PArt 2:Operating conditions--Section 2:Environmental conditions (cli-matic,mechanical and other non-electrical influences)
    远动设备及系统 第2部分:工作条件 第2篇:环境条件(气候、机械和其他非电影响因素)
    China National Standards
    PA

    English PDF
    GB/T 12162.1-2000 X and gamma reference radiation for calibrating dose meters and doserate meters and for determining their response as a function of photon energy--PArt 1:Radiation characteristics and production methods
    用于校准剂量仪和剂量率仪及确定其能量响应的X和γ参考辐射 第1部分:辐射特性及产生方法
    China National Standards
    PA

    English PDF
    GB/T 4588.12-2000 Specification for mass laminationPAnels (semi-manufactured multilayer printed boards)
    预制内层层压板规范(半制成多层印制板)
    China National Standards
    PA

    English PDF
    GB/T 17737.2-2000 Radio-frequency cables--PArt 2:Sectional specification for semi-rigid radio-frequency and coaxial cables with polytetrafluoroethylene(PTFE) insulation
    射频电缆 第2部分:聚四氟乙烯(PTFE)绝缘半硬射频同轴电缆分规范
    China National Standards
    PA

    English PDF
    GB/T 18272.5-2000 Industrial-process measurement and control--Evaluation of system properties for the purpose of system assessment--PArt 5:Assessment of system dependability
    工业过程测量和控制 系统评估中系统特性的评定 第5部分:系统可信性评估
    China National Standards
    PA

    English PDF
    GB/T 18272.3-2000 Industrial-process measurement and control--Evaluation of system properties for the purpose of system assessment--PArt 3:Assessment of system function-ality
    工业过程测量和控制 系统评估中系统特性的评定 第3部分:系统功能性评估
    China National Standards
    PA

    English PDF
    GB/T 18272.2-2000 Industrial-process measurement and control--Evaluation of system properties for the purpose of system assessment--PArt 2:Assessment methodology
    工业过程测量和控制 系统评估中系统特性的评定 第2部分:评估方法学
    China National Standards
    PA

    English PDF
    GB/T 18272.1-2000 Industrial-process measurement and control--Evaluation of system properties for the purpose of system assessment--PArt 1:General consideration and methodology
    工业过程测量和控制 系统评估中系统特性的评定 第1部分:总则和方法学
    China National Standards
    PA

    English PDF
    GB/T 18271.4-2000 Process measurement and control devices--General methods and procedures for evaluating performance--PArt 4:Evaluation report content
    过程测量和控制装置 通用性能评定方法和程序 第4部分:评定报告的内容
    China National Standards
    PA

    English PDF
    GB/T 18271.3-2000 Process measurement and control devices--General methods and procedures for evaluating performance--PArt 3:Tests for the effects of influence quantities
    过程测量和控制装置 通用性能评定方法和程序 第3部分:影响量影响的试验
    China National Standards
    PA

    English PDF
    GB/T 18271.2-2000 Process measurement and control devices--General methods and procedures for evaluating performance--PArt 2:Tests under reference conditions
    过程测量和控制装置 通用性能评定方法和程序 第2部分:参比条件下的试验
    China National Standards
    PA

    English PDF
    GB/T 18271.1-2000 Process measurement and control devices--General methods and procedures for evaluating performance--PArt 1:General considerations
    过程测量和控制装置 通用性能评定方法和程序 第1部分:总则
    China National Standards
    PA

    English PDF
    GB/T 17214.3-2000 Operating conditions for industrial-process measurement and control equipment--PArt 3:Mechanical influences
    工业过程测量和控制装置的工作条件 第3部分:机械影响
    China National Standards
    PA

    English PDF
    GB/T 18266.1-2000 Ranking standard for gymnasium and playground--PArt 1:Star-rating standard for bowling playground
    体育场所等级的划分 第1部分:保龄球馆星级的划分及评定
    China National Standards
    PA

    English PDF
    GB/T 5051-2000 General technical conditions for the PArticle forming machine
    刨花铺装机通用技术条件
    China National Standards
    PA

    English PDF
    GB/T 18264-2000 Acceptance generality of the PArticle board production line
    刨花板生产线验收通则
    China National Standards
    PA

    English PDF
    GB/T 18263-2000 Wood-based PAnel machinery--Hot presses for terminology
    人造板机械 热压机术语
    China National Standards
    PA

    English PDF
    GB/T 18262-2000 General specifications for wood-based PAnel mach-inery
    人造板机械通用技术条件
    China National Standards
    PA

    English PDF
    GB/T 2997-2000 Test method for bulk density,apPArent porosity and true porosity of dense shaped refractory products
    致密定形耐火制品 体积密度、显气孔率和真气孔率 试验方法
    China National Standards
    PA

    English PDF
    GB/T 18247.7-2000 Product grade for major ornamental plants--PArt 7:Turf
    主要花卉产品等级 第7部分:草坪
    China National Standards
    PA

    English PDF
    GB/T 18247.6-2000 Product grade for major ornamental plants--PArt 6:Flower bulbs
    主要花卉产品等级 第6部分:花卉种球
    China National Standards
    PA

    English PDF
    GB/T 18247.5-2000 Product grade for major ornamental plants--PArt 5:Young plants
    主要花卉产品等级 第5部分:花卉种苗
    China National Standards
    PA

    English PDF
    GB/T 18247.4-2000 Product grade for major ornamental plants--PArt 4:Flower seeds
    主要花卉产品等级 第4部分:花卉种子
    China National Standards
    PA

    English PDF
    GB/T 18247.3-2000 Product grade for major ornamental plants--PArt 3:Foliage potted plants
    主要花卉产品等级 第3部分:盆栽观叶植物
    China National Standards
    PA

    English PDF
    GB/T 18247.2-2000 Product grade for major ornamental plants--PArt 2:Flowering potted plants
    主要花卉产品等级 第2部分:盆花
    China National Standards
    PA

    English PDF
    GB/T 18247.1-2000 Product grade for major ornamental plants--PArt 1:Cut flowers
    主要花卉产品等级 第1部分:鲜切花
    China National Standards
    PA

    English PDF
    GB/T 18241.3-2000 Rubber lining--PArt 3:Lining for floatation machine
    橡胶衬里 第3部分:浮选机衬里
    China National Standards
    PA

    English PDF
    GB/T 18241.2-2000 Rubber lining--PArt 2:Lining for grinding mills
    橡胶衬里 第2部分:磨机衬里
    China National Standards
    PA

    English PDF
    GB/T 18249-2000 Ferroalloys--Experimental methods for checking the bias of sampling and sample prePAration
    检查铁合金取样和制样偏差的试验方法
    China National Standards
    PA

    English PDF
    GB/T 15970.4-2000 Corrosion of metals and alloys--Stress corrosion testing--PArt 4:Preparation and use of uniaxially loaded tension specimens
    金属和合金的腐蚀 应力腐蚀试验 第4部分:单轴加载拉伸试样的制备和应用
    China National Standards
    PA

    English PDF
    GB/T 15970.2-2000 Corrosionof metals and alloys--Stress corrosion testing--PArt 2:Preparation and use of bent-beam specimens
    金属和合金的腐蚀 应力腐蚀试验 第2部分:弯梁试样的制备和应用
    China National Standards
    PA

    English PDF
    GB/T 3367.5-2000 Glossary of terms for railwaylocomotive--Names of component PArts for air brake equipment
    铁道机车名词术语 空气制动装置零部件名词
    China National Standards
    PA

    English PDF
    GB/T 3367.4-2000 Glossary of termsfor railway locomotive--Names of component PArts for diesel locomotive body andbogie
    铁道机车名词术语 内燃机车车体和转向架零部件名词
    China National Standards
    PA

    English PDF
    GB/T 3367.3-2000 Glossary of terms for railway locomotive--Names of component PArts for diesel locomotive auxiliary device
    铁道机车名词术语 内燃机车辅助装置零部件名词
    China National Standards
    PA

    English PDF
    GB/T 3367.2-2000 Glossary of terms for railwaylocomotive--Names of component PArts for hydraulic transmission system
    铁道机车名词术语 液力传动系统零部件名词
    China National Standards
    PA

    English PDF
    GB/T 3367.1-2000 Glossary of terms for railway locomotive--Names of component PArts for diesel engine
    铁道机车名词术语 柴油机零部件名词
    China National Standards
    PA

    English PDF
    GB/T 6588-2000 Semiconductor devices--Discrete devices--PArt 3:Signal(including switching) and regulator diodes--Section One--Blank detail specification for signal diodes,switching diodes and controlled-avalanche diodes
    半导体器件 分立器件 第3部分:信号(包括开关)和调整二极管 第1篇 信号二极管、开关二极管和可控雪崩二极管空白详细规范
    China National Standards
    PA

    English PDF
    GB/T 17975.9-2000 Information technology--Generic coding of moving pictures and associated audio information--PArt 9:Extension for real time interface for systems decoders
    信息技术 运动图像及其伴音信息的通用编码 第9部分:系统解码器的实时接口扩展
    China National Standards
    PA

    English PDF
    GB/T 16649.7-2000 Identification cards--Integrated circuit(s) cards with contacts--PArt 7:Interindustry commands for Structured Card Query Language(SCQL)
    识别卡 带触点的集成电路卡 第7部分:用于结构化卡查询语言(SCQL)的行业间命令
    China National Standards
    PA

    English PDF
    GB 13836-2000 Cabled distributionsystems for television and sound signals--PArt 2:Electromagnetic compatibility of equipment
    电视和声音信号电缆分配系统 第2部分:设备的电磁兼容
    China National Standards
    PA

    English PDF
    GB/T 18238.1-2000 Information technology--Security techniques--Hash-function--PArt 1:General
    信息技术 安全技术 散列函数 第1部分:概述
    China National Standards
    PA

    English PDF
    GB/T 18237.3-2000 Information technology--Open Systems Interconnection--Generic upper layers security--PArt 3:Security Exchange Service Element(SESE) protocol specification
    信息技术 开放系统互连 通用高层安全 第3部分:安全交换服务元素(SESE)协议规范
    China National Standards
    PA

    English PDF
    GB/T 18237.2-2000 Information technology--Open Systems Interconnection--Generic upper layers security--PArt 2:Security Exchange Service Element(SESE)service definition
    信息技术 开放系统互连 通用高层安全 第2部分:安全交换服务元素(SESE)服务定义
    China National Standards
    PA

    English PDF
    GB/T 18237.1-2000 Information technology--Open Systems Interconnection--Generic upper layers security--PArt 1:Overview, models and notation
    信息技术 开放系统互连 通用高层安全 第1部分:概述、模型和记法
    China National Standards
    PA

    English PDF
    GB/T 18236.1-2000 Information technology--Telecommunications and information exchange between systems--Local and metropolitan area networks--Common specifications--PArt 1:Medium Access Control(MAC)service definition
    信息技术 系统间远程通信和信息交换 局域网和城域网 公共规范 第1部分:媒体访问控制(MAC)服务定义
    China National Standards
    PA

    English PDF
    GB/T 18235.1-2000 Information technology--High-Performance PArallel Interface--Part 1:Mechanical,electrical and signaling protocol specification (HIPPI-PH)
    信息技术 高性能并行接口 第1部分:机械、电气及信号协议规范(HIPPI-PH)
    China National Standards
    PA

    English PDF
    GB/T 18228-2000 Air cargo PAllet nets--Specification and testing
    航空货运集装板网 技术条件和试验方法
    China National Standards
    PA

    English PDF
    GB/T 18227-2000 Air cargo PAllets--Specification and testing
    航空货运集装板 技术条件和试验方法
    China National Standards
    PA

    English PDF
    GB/T 18225-2000 Terminology for PAssenger transport by water
    水路客运术语
    China National Standards
    PA

    English PDF
    GB 5959.11-2000 Safety in electroheat installations--PArt 11:Particular requirements for installations for electromagnetic stirring,transport or pouring of metal liquids
    电热设备的安全 第十一部分:对液态金属电磁搅拌、输送或浇注设备的特殊要求
    China National Standards
    PA

    English PDF
    GB 16915.3-2000 Switches for household and similar fixed electrical installations--PArt 2:Particular requirements--Section 2:Remote-control switches(RCS)
    家用和类似用途固定式电气装置的开关 第2部分:特殊要求 第2节:遥控开关(RCS)
    China National Standards
    PA

    English PDF
    GB 13960.11-2000 Safety of transportable motor-operated electric tools--PArt 2:Particular requirements for cutting-off grinders
    可移式电动工具的安全 第二部分:型材切割机的专用要求
    China National Standards
    PA

    English PDF
    GB/T 2424.25-2000 Environmental testing for electric and electronic products--PArt 3:Test guidance--Seismic test methods
    电工电子产品环境试验 第3部分:试验导则 地震试验方法
    China National Standards
    PA

    English PDF
    GB 3836.15-2000 Electrical apPAratus for explosive gas atmospheres--Part 15:Electrical installation in hazardous areas (other than mines)
    爆炸性气体环境用电气设备 第15部分:危险场所电气安装(煤矿除外)
    China National Standards
    PA

    English PDF
    GB 10408.5-2000 Detectors for intruder alarm systems--PArt 5:Passive infrared detectors for use in buildings
    入侵探测器 第5部分:室内用被动红外探测器
    China National Standards
    PA

    English PDF
    GB 10408.4-2000 Detectors for intruder alarm systems--PArt 4:Active infrared intrusion detectors
    入侵探测器 第4部分:主动红外入侵探测器
    China National Standards
    PA

    English PDF
    GB 10408.3-2000 Detectors for intruder alarm systems--PArt 3:Microwave Doppler detectors for use in buildings
    入侵探测器 第3部分:室内用微波多普勒探测器
    China National Standards
    PA

    English PDF
    GB 10408.2-2000 Detectors for intruder alarm systems--PArt 2:Ultrasonic Doppler detectors for use in buildings
    入侵探测器 第2部分:室内用超声波多普勒探测器
    China National Standards
    PA

    English PDF
    GB 10408.1-2000 Detectors for intruder alarm systems--PArt 1:Requirements for detectors--General
    入侵探测器 第1部分:通用要求
    China National Standards
    PA

    English PDF
    GB/T 4880.2-2000 Codes for the representation of names of languages--PArt 2:Alpha-3 code
    语种名称代码 第2部分:3字母代码
    China National Standards
    PA

    English PDF
    GB/T 18214.1-2000 Global navigation satellite systems(GNSS)--PArt 1:Global positioning system(GPS)--Receiver equipment--Performance standards,methods of testing and required test results
    全球导航卫星系统(GNSS) 第1部分:全球定位系统(GPS) 接收设备性能标准、测试方法和要求的测试结果
    China National Standards
    PA

    English PDF
    GB/T 1242-2000 Dimensions for PAnel mounted indicating and recording electrical measuring instruments
    安装式指示和记录电测量仪表的尺寸
    China National Standards
    PA

    English PDF
    GB/T 18200-2000 Report form and contents for radiation induced occuPAtional diseases
    职业性放射性疾病报告格式与内容
    China National Standards
    PA

    English PDF
    GB 16852.6-2000 Diagnosis of occuPAtional acute chemicals poisoning--Part 6:Diagnostic criteria of occupational acute toxic pulmonopathy
    职业性急性化学物中毒的诊断 第6部分:职业性急性化学物中毒性呼吸系统疾病的诊断
    China National Standards
    PA

    English PDF
    GB/T 819.1-2000 Countersunk flat head screws(common head style)with cross recess--PArt 1:Steel of property class 4.8
    十字槽沉头螺钉 第1部分:钢4.8级
    China National Standards
    PA

    English PDF
    GB/T 818-2000 PAn head screws with cross recess
    十字槽盘头螺钉
    China National Standards
    PA

    English PDF
    GB/T 3098.17-2000 Mechanical properties of fasteners--Preloading test for the detection of hydrogen embrittlement--PArallel bearing surface method
    紧固件机械性能 检查氢脆用预载荷试验 平行支承面法
    China National Standards
    PA

    English PDF
    GB/T 120.2-2000 PArallel pins with internal thread,of hardened steel and martensitic stainless steel
    内螺纹圆柱销 淬硬钢和马氏体不锈钢
    China National Standards
    PA

    English PDF
    GB/T 120.1-2000 PArallel pins with internal thread,of unhardened steel and austenitic stainless steel
    内螺纹圆柱销 不淬硬钢和奥氏体不锈钢
    China National Standards
    PA

    English PDF
    GB/T 119.2-2000 PArallel pins,of hardened steel and martensitic stainless steel(Dowel pins)
    圆柱销 淬硬钢和马氏体不锈钢
    China National Standards
    PA

    English PDF
    GB/T 119.1-2000 PArallel pins,of unhardened steel and austenitic stainless steel
    圆柱销 不淬硬钢和奥氏体不锈钢
    China National Standards
    PA

    English PDF
    GB/T 10708.3-2000 Reciprocating rubber seals--Types,dimensions and tolerances--PArt 3:Rubber dust seals
    往复运动橡胶密封圈结构尺寸系列 第3部分:橡胶防尘密封圈
    China National Standards
    PA

    English PDF
    GB/T 10708.2-2000 Reciprocating rubber seals--Types,dimensions and tolerances--PArt 2:Rubber seals on two-way
    往复运动橡胶密封圈结构尺寸系列 第2部分:双向密封橡胶密封圈
    China National Standards
    PA

    English PDF
    GB/T 10708.1-2000 Reciprocating rubber seals--Types,dimensions and tolerances--PArt 1:Rubber seals on one-way
    往复运动橡胶密封圈结构尺寸系列 第1部分:单向密封橡胶密封圈
    China National Standards
    PA

    English PDF
    GB/T 18178-2000 General rules of the selection for PAinting system of water paint
    水性涂料涂装体系选择通则
    China National Standards
    PA

    English PDF
    GB/T 1232.1-2000 Rubber,unvulcanized--Determinations using a shearing-disc viscometer--PArt 1:Determination of Mooney viscosity
    未硫化橡胶 用圆盘剪切粘度计进行测定 第1部分:门尼粘度的测定
    China National Standards
    PA

    English PDF
    GB 4838-2000 PAckaging for emulsifiable concentrates of pesticides
    农药乳油包装
    China National Standards
    PA

    English PDF
    GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads--PArt 2:Taper internal and external threads
    55°密封管螺纹 第2部分:圆锥内螺纹与圆锥外螺纹
    China National Standards
    PA

    English PDF
    GB/T 7306.1-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads--PArt 1:Parallel internal and taper external threads
    55°密封管螺纹 第1部分:圆柱内螺纹与圆锥外螺纹
    China National Standards
    PA

    English PDF
    GB/T 18148-2000 Testing method of the comPAction performance of rollers and compactors
    压实机械压实性能试验方法
    China National Standards
    PA

    English PDF
    GB/T 18146.1-2000 Hemp fibre--PArt 1:Raw white degummed hemp
    大麻纤维 第1部分:大麻精麻
    China National Standards
    PA

    English PDF
    GB/T 15970.7-2000 Corrosion of metals and alloys--Stress corrosion testing--PArt 7:Slow strain rate testing
    金属和合金的腐蚀 应力腐蚀试验 第7部分:慢应变速率试验
    China National Standards
    PA

    English PDF
    GB/T 17006.5-2000 Evaluation and routine testing in medical imaging dePArtments--Part 2-5:Constancytests--Image display devices
    医用成像部门的评价及例行试验 第2-5部分:图像显示装置稳定性试验
    China National Standards
    PA

    English PDF
    GB/T 17006.4-2000 Evaluation and routine testing in medical imaging dePArtments--Part 2-3:Constancy tests--Darkroom safelight conditions
    医用成像部门的评价及例行试验 第2-3部分:暗室安全照明状态稳定性试验
    China National Standards
    PA

    English PDF
    GB/T 17006.3-2000 Evaluation and routine testing in medical imaging dePArtments--Part 2-2:Constancy tests--Radio-graphic cassettes and film changers--Film-screen contact and relative sensitivity of the screen-cassette assembly
    医用成像部门的评价及例行试验 第2-2部分:X射线摄影暗匣和换片器 屏-片接触和屏-匣组件相对灵敏度稳定性试验
    China National Standards
    PA

    English PDF

    Find out:18320Items   |  To Page of: First -Previous-Next -Last  | [166] [167] [168] [169] [170] [171] [172]

     

    +86-755-25831330        sales@gbstandards.org 
    106# Zhongmao Mansion,No.1 Beizhan Road,Shenzhen,China
    ©  RJS Copyright  2001-2024 All Rights Reserved

    - Since 2001 -
    Focus on China Standards & Compliance Services

    www.rjs.cn

    China Licenses

    www.transcustoms.com

    China HS code & Tariff

    www.gbstandards.org

    China National Standards