China National Standards

China Ra 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 "Ra" GB Standards English PDF List:
  • Standard  Code Standard Title Standard Class Order
    GB/T 14214-2003 Spectacle fRames--General requirements and test methods
    眼镜架 通用要求和试验方法
    China National Standards
    Ra

    English PDF
    GB/T 7928-2003 GeneRal technical specification for metro vehicles
    地铁车辆通用技术条件
    China National Standards
    Ra

    English PDF
    GB/T 7679.7-2003 Mining machinery terminology--Part 7:MineRal processing equipment
    矿山机械术语 第7部分:洗选设备
    China National Standards
    Ra

    English PDF
    GB/T 4331-2003 Test methods for agricultuRal trailer
    农用挂车试验方法
    China National Standards
    Ra

    English PDF
    GB/T 12362-2003 ToleRances and machining--Allowances ofsteel die forging
    钢质模锻件 公差及机械加工余量
    China National Standards
    Ra

    English PDF
    GB/T 12361-2003 GeneRal specification of steel die forgings
    钢质模锻件 通用技术条件
    China National Standards
    Ra

    English PDF
    GB/T 10605-2003 Center driving rotary-Rake thickener
    中心传动式浓缩机
    China National Standards
    Ra

    English PDF
    GB 7957-2003 GeneRal requirements for safety of cap lamp
    矿灯安全性能通用要求
    China National Standards
    Ra

    English PDF
    GB 13749-2003 Diesel pile driver--Safety opeRation rules
    柴油打桩机 安全操作规程
    China National Standards
    Ra

    English PDF
    GB/Z 6413.2-2003 Calculation of scuffing load capacity of cylindrical,bevel and hypoid gears--Part 2:IntegRal temperature method
    圆柱齿轮、锥齿轮和准双曲面齿轮 胶合承载能力计算方法 第2部分:积分温度法
    China National Standards
    Ra

    English PDF
    GB/Z 6413.1-2003 Calculation of scuffing load capacity of cylindrical,bevel and hypoid gears--Part 1:Flash tempeRature method
    圆柱齿轮、锥齿轮和准双曲面齿轮 胶合承载能力计算方法 第1部分:闪温法
    China National Standards
    Ra

    English PDF
    GB/T 9485-2003 Radial turbochargers--Connection dimensions
    径流式涡轮增压器 联接尺寸
    China National Standards
    Ra

    English PDF
    GB/T 7932-2003 Pneumatic fluid power--GeneRal rules relating tosystems
    气动系统通用技术条件
    China National Standards
    Ra

    English PDF
    GB/T 4199-2003 Rolling bearings--ToleRances--Definitions
    滚动轴承 公差 定义
    China National Standards
    Ra

    English PDF
    GB/T 2352-2003 HydRaulic fluid power--Gas-loaded accumulators with separator--Ranges of pressures and volumes and characteristic quantities
    液压传动 隔离式充气蓄能器压力和容积范围及特征量
    China National Standards
    Ra

    English PDF
    GB/T 19412-2003 Method of measurement and Rating of air conditioning system with thermal storage
    蓄冷空调系统的测试和评价方法
    China National Standards
    Ra

    English PDF
    GB/T 19408.1-2003 AgricultuRal vehicles--Mechanical connections between towed and towing vehicles--Part 1:Dimensions of hitch-hooks
    农业车辆 挂车和牵引车的机械连接 第1部分:牵引钩尺寸
    China National Standards
    Ra

    English PDF
    GB/T 19407-2003 AgricultuRal tractor--Maximum actuating forces required to operate controls
    农业拖拉机操纵装置最大操纵力
    China National Standards
    Ra

    English PDF
    GB/T 15623.2-2003 HydRaulic fluid power--Electrically modulated hydraulic control valves--Part 2:Test methods for three-way directional flow control valves
    液压传动 电调制液压控制阀 第2部分:三通方向流量控制阀试验方法
    China National Standards
    Ra

    English PDF
    GB/T 15623.1-2003 HydRaulic fluid power--Electrically modulated hydraulic control valves--Part 1:Test methods for four-way directional flow control valves
    液压传动 电调制液压控制阀 第1部分:四通方向流量控制阀试验方法
    China National Standards
    Ra

    English PDF
    GB/T 10911-2003 Matching of agricultuRal wheeled tractors and rear mounted implements
    农业轮式拖拉机和后悬挂农具的匹配
    China National Standards
    Ra

    English PDF
    GB/T 10062.2-2003 Calculation of load capacity of bevel gear--Part 2:Calculation of surface duRability(pitting)
    锥齿轮承载能力计算方法 第2部分:齿面接触疲劳(点蚀)强度计算
    China National Standards
    Ra

    English PDF
    GB/T 10062.1-2003 Calculation of load capacity of bevel gear--Part 1:Introduction and geneRal influence factors
    锥齿轮承载能力计算方法 第1部分:概述和通用影响系数
    China National Standards
    Ra

    English PDF
    GB/T 7424.1-2003 Generic specification for optical fibre cables--Part 1:GeneRal
    光缆总规范 第1部分:总则
    China National Standards
    Ra

    English PDF
    GB/T 19405.2-2003 Surface mounting technology--Part 2:TRansportation and storage conditions of surface mounting devices(SMD)--Application guide
    表面安装技术 第2部分:表面安装元器件的运输和贮存条件 应用指南
    China National Standards
    Ra

    English PDF
    GB/T 19403.1-2003 Semiconductor devices--IntegRated circuits--Part 11:Section 1:Internal visual examination for semiconductor integrated circuits(excluding hybrid circuits)
    半导体器件 集成电路 第11部分:第1篇:半导体集成电路 内部目检 (不包括混合电路)
    China National Standards
    Ra

    English PDF
    GB/T 18794.7-2003 Information technology--Open Systems Interconnection--Security fRameworks for open systems--Part 7:Security audit and alarms framework
    信息技术 开放系统互连 开放系统安全框架 第7部分:安全审计和报警框架
    China National Standards
    Ra

    English PDF
    GB/T 18794.6-2003 Information technology--Open Systems Interconnection--Security fRameworks for open systems--Part 6:Integrity framework
    信息技术 开放系统互连 开放系统安全框架 第6部分:完整性框架
    China National Standards
    Ra

    English PDF
    GB/T 18794.5-2003 Information technology--Open Systems Interconnection--Security fRameworks for open systems--Part 5:Confidentiality framework
    信息技术 开放系统互连 开放系统安全框架 第5部分:机密性框架
    China National Standards
    Ra

    English PDF
    GB/T 18794.4-2003 Information technology--Open Systems Interconnection--Security fRameworks for open systems--Part 4:Non-repudiation framework
    信息技术 开放系统互连 开放系统安全框架 第4部分:抗抵赖框架
    China National Standards
    Ra

    English PDF
    GB/T 18794.3-2003 Information technology--Open Systems Interconnection--Security fRameworks for open systems--Part 3:Access control framework
    信息技术 开放系统互连 开放系统安全框架 第3部分:访问控制框架
    China National Standards
    Ra

    English PDF
    GB/T 18311.40-2003 Fibre optic interconnecting devices and passivecomponents--Basic test and measurement procedures--Part 3-40:Examinations and measurements--Extinction Ratio of a polarization maintaining(pm)fibre pigtailed connector
    纤维光学互连器件和无源器件 基本试验和测量程序 第3-40部分:检查和测量 带保偏光纤尾纤连接器的消光比
    China National Standards
    Ra

    English PDF
    GB/T 18311.34-2003 Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 3-34:Examinations and measurements--Attenuation of Random mated connectors
    纤维光学互连器件和无源器件 基本试验和测量程序 第3-34部分:检查和测量 随机配接连接器的衰减
    China National Standards
    Ra

    English PDF
    GB/T 18310.45-2003 Fibre optic interconnecting devices and passive components--Basic test and measurement procedures--Part 2-45:Tests--DuRability test by water immersion
    纤维光学互连器件和无源器件 基本试验和测量程序 第2-45部分:试验 浸水耐久性
    China National Standards
    Ra

    English PDF
    GB/T 18310.22-2003 Fibre optic interconnecting devices and passive components--Basic test andmeasurement procedures--Part 2-22:Tests--Change of tempeRature
    纤维光学互连器件和无源器件 基本试验和测量程序 第2-22部分:试验 温度变化
    China National Standards
    Ra

    English PDF
    GB/T 17574.10-2003 Semiconductor devices--IntegRated circuits--Part 2-10:Digital integrated circuits--Blank detail specification for integrated circuit dynamicread/write memories
    半导体器件 集成电路 第2-10部分:数字集成电路 集成电路动态读/写存储器空白详细规范
    China National Standards
    Ra

    English PDF
    GB/T 15651.3-2003 Discrete semiconductor devices and integRated circuits--Part 5-3:Optoelectronic devices--Measuring methods
    半导体分立器件和集成电路 第5-3部分:光电子器件 测试方法
    China National Standards
    Ra

    English PDF
    GB/T 15651.2-2003 Discrete semiconductor devices and integRated circuits--Part 5-2:Optoelectronic devices--Essential ratings and characteristics
    半导体分立器件和集成电路 第5-2部分:光电子器件 基本额定值和特性
    China National Standards
    Ra

    English PDF
    GB/T 7920.9-2003 Earth-moving machinery--GRaders--Terminology and commercial specifications
    土方机械 平地机 术语和商业规格
    China National Standards
    Ra

    English PDF
    GB/T 7920.8-2003 Earth-moving machinery--ScRapers--Terminology and commercial specifications
    土方机械 铲运机 术语和商业规格
    China National Standards
    Ra

    English PDF
    GB/T 7920.15-2003 Asphalt stoRage,melting and heating units--Termin-ology
    沥青储存、熔化和加热装置 术语
    China National Standards
    Ra

    English PDF
    GB/Z 19398-2003 Industrial automation systems and integRation--Operating conditions for discrete part manufacturing-equipment in industrial environments
    工业自动化系统与集成 离散部件制造设备在工业环境中的工作条件
    China National Standards
    Ra

    English PDF
    GB/T 19400-2003 Industrial robots--Object handling gRasp-type grippers--Vocabulary and presentation of characteristics
    工业机器人 抓握型夹持器物体搬运 词汇和特性表示
    China National Standards
    Ra

    English PDF
    GB/T 19399-2003 Industrial robots--GRaphical user interfaces for programming and operation of robots(GUI-R)
    工业机器人 编程和操作图形用户接口
    China National Standards
    Ra

    English PDF
    GB 7667-2003 The dose of X-Rays leakage from electron microscope
    电子显微镜X射线泄漏剂量
    China National Standards
    Ra

    English PDF
    GB/T 3382.2-2003 Technical requirements for group 3 facsimile appaRatus used in public telephone network--Part 2:Procedures for document facsimile transmission in the general switched telephone network
    文件传真三类机在电话网中的互通技术条件 第2部分:在公用电话交换网上的文件传真传输规程
    China National Standards
    Ra

    English PDF
    GB/T 3382.1-2003 Technical requirements for group 3 facsimile appaRatus used in public telephone network--Part 1:Standardization of group 3 facsimile terminals for document transmission
    文件传真三类机在电话网中的互通技术条件 第1部分:用于文件传输的三类传真终端的标准化
    China National Standards
    Ra

    English PDF
    GB/T 19393-2003 Rating of direct coupled photovoltaic(PV)--Pumping systems
    直接耦合光伏(PV)扬水系统的评估
    China National Standards
    Ra

    English PDF
    GB/T 19333.5-2003 GeogRaphic information--Conformance and testing
    地理信息 一致性与测试
    China National Standards
    Ra

    English PDF
    GB/T 12690.9-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals andtheir oxides--Determination of chlorine content--Silver nitrate turbidimetric method
    稀土金属及其氧化物中非稀土杂质化学分析方法 氯量的测定 硝酸银比浊法
    China National Standards
    Ra

    English PDF
    GB/T 12690.8-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of sodium content--Flame atomic absorption spectrometric method
    稀土金属及其氧化物中非稀土杂质化学分析方法 钠量的测定 火焰原子吸收光谱法
    China National Standards
    Ra

    English PDF
    GB/T 12690.7-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of silicon content--Molybdenum blue spectrophotometric method
    稀土金属及其氧化物中非稀土杂质化学分析方法 硅量的测定 钼蓝分光光度法
    China National Standards
    Ra

    English PDF
    GB/T 12690.6-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of iron content--Kalium thiocyanate,1,10-phenanthroline spectrophotometric method
    稀土金属及其氧化物中非稀土杂质化学分析方法 铁量的测定 硫氰酸钾、1,10-二氮杂菲分光光度法
    China National Standards
    Ra

    English PDF
    GB/T 12690.5-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of Al、Cr、Mn、Fe、Co、Ni、Cu、Zn、Pb content by inductively coupled plasma atomic emission spectrographic method--Determination of Co、M
    稀土金属及其氧化物中非稀土杂质化学分析方法 铝、铬、锰、铁、钴、镍、铜、锌、铅的测定 电感耦合等离子体发射光谱法(方法1) 钴、锰、铅、镍、铜、锌、铝、铬的测定 电感耦合等离子
    China National Standards
    Ra

    English PDF
    GB/T 12690.4-2003 Chemical analysis methods for non-Rare earth impurities ofrare earth metals and their oxides--Determination of oxygen and nitrogen content--Impulse-infrared and impulse-thermal conductance absorption method
    稀土金属及其氧化物中非稀土杂质化学分析方法 氧、氮量的测定 脉冲-红外吸收法和脉冲-热导法
    China National Standards
    Ra

    English PDF
    GB/T 12690.13-2003 Chemical analysis methods for non-Rareearth impurities of rare earth metals and their oxides--Determination of molybdenum and tungsten content--Induct-ively coupled plasma atomic emission spectrographic method and inductively coupled plasma mass spectrum
    稀土金属及其氧化物中非稀土杂质化学分析方法 钼、钨量的测定 电感耦合等离子体发射光谱法和电感耦合等离子体质谱法
    China National Standards
    Ra

    English PDF
    GB/T 12690.12-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of thorium content--Arsenazo III spectrophotometric method and inductively coupled plasma mass spectrum method
    稀土金属及其氧化物中非稀土杂质化学分析方法 钍量的测定 偶氮胂III分光光度法和电感耦合等离子体质谱法
    China National Standards
    Ra

    English PDF
    GB/T 12690.11-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of magnesium content--Flame atomic absorptionspectrometric method
    稀土金属及其氧化物中非稀土杂质化学分析方法 镁量的测定 火焰原子吸收光谱法
    China National Standards
    Ra

    English PDF
    GB/T 12690.10-2003 Chemical analysis methods for non-Rare earth impurities of rare earth metals and their oxides--Determination of phosphorus content by molybdenum blue spectrophotometric method
    稀土金属及其氧化物中非稀土杂质化学分析方法 磷量的测定 钼蓝分光光度法
    China National Standards
    Ra

    English PDF
    GB/T 9167-2003 Spline hobbing machines--Testing of the accuRacy
    花键轴铣床 精度检验
    China National Standards
    Ra

    English PDF
    GB/T 8606-2003 Thread connectiong dimensions andspecifications of hydRaulic fluid power--Quick action couplings
    液压快换接头 螺纹连接尺寸及技术要求
    China National Standards
    Ra

    English PDF
    GB/T 5861-2003 HydRaulic fluid power--Quick action couplings--Test methods
    液压快换接头 试验方法
    China National Standards
    Ra

    English PDF
    GB/T 5860-2003 HydRaulic fluid power--Quick action couplings--Dimensions and requirements
    液压快换接头 尺寸和要求
    China National Standards
    Ra

    English PDF
    GB/T 5291.2-2003 Die sinking electro-discharge machines(EDM)----Testin of accuRacy----Part 2:Two column machines(Slide-head type and cross-slide table type)
    电火花成形机 精度检验 第2部分:双立柱机床(移动主轴头型和十字工作台型)
    China National Standards
    Ra

    English PDF
    GB/T 5290.2-2003 Die sinking electro-discharge machines(EDM)----PaRameters----Part 2:Two column machines (Slide-head type and cross slide table type)
    电火花成形机 参数 第2部分:双立柱机床 (移动主轴头型和十字工作台型)
    China National Standards
    Ra

    English PDF
    GB/T 3934-2003 Specification of gauges for geneRal purpose screw threads
    普通螺纹量规 技术条件
    China National Standards
    Ra

    English PDF
    GB/T 19381-2003 GeneRal methods of test for medical closures of butyl rubber
    丁基橡胶药用瓶塞通用试验方法
    China National Standards
    Ra

    English PDF
    GB/T 19362.1-2003 Machine tools--Test conditions for bridge-type milling machines--Testing of the accuRacy--Part 1:Fixed bridge (portal-type)machines
    龙门铣床检验条件 精度检验 第1部分:固定式龙门铣床
    China National Standards
    Ra

    English PDF
    GB/T 19361-2003 Wire electrical-discharge machines(Unidirectional tRaveling type)--Testing of the accuracy
    电火花线切割机(单向走丝型) 精度检验
    China National Standards
    Ra

    English PDF
    GB/T 14828-2003 Test method for measuring tRaction performance of agricultural tyres
    农业轮胎牵引性能试验方法
    China National Standards
    Ra

    English PDF
    GB/T 11852-2003 ToleRances and specification of taper gauges
    圆锥量规公差与技术条件
    China National Standards
    Ra

    English PDF
    GB/T 9185-2003 PhotogRaphy--135-size film and magazine--Specifications
    摄影师 135规格胶片和暗盒 规范
    China National Standards
    Ra

    English PDF
    GB/T 606-2003 Chemical reagent--GeneRal method for the determination of water--Karl Fischer method
    化学试剂 水分测定通用方法 卡尔·费休法
    China National Standards
    Ra

    English PDF
    GB/T 6850-2003 CinematogRaphy--Labelling of containers for raw-stock motion-picture films and magnetic films--Minimum information specifications
    电影 电影生胶片和涂磁胶片片盒标签 最低限度内容规定
    China National Standards
    Ra

    English PDF
    GB/T 19385.3-2003 Textile machinery and accessories--Heald fRames--Part 3:Guides for heald frames
    纺织机械与附件 综框 第3部分:综框导板
    China National Standards
    Ra

    English PDF
    GB/T 19385.2-2003 Textile machinery and accessories--Heald fRames--Part 2:Heald-carrying rod fixed directly on the frame stave--Coordinated dimensions
    纺织机械与附件 综框 第2部分:穿综杆直接固定于综框横梁 相关尺寸
    China National Standards
    Ra

    English PDF
    GB/T 19385.1-2003 Textile machinery and accessories--Heald fRames--Part 1:Heald-carrying rod fixed to the frame stave by rod support--Coordinated dimensions
    纺织机械与附件 综框 第1部分:穿综杆用托座固定于综框横梁 相关尺寸
    China National Standards
    Ra

    English PDF
    GB/T 19373-2003 Determination of carbamate pesticide residues in feeds--Gas chromatogRaphy
    饲料中氨基甲酸酯类农药残留量测定 气相色谱法
    China National Standards
    Ra

    English PDF
    GB/T 19372-2003 Determination of pyrethroids residues in feeds--Gas chromatogRaphy
    饲料中除虫菊酯类农药残留量测定 气相色谱法
    China National Standards
    Ra

    English PDF
    GB/T 19369-2003 TurfgRass sod production standard
    草皮生产技术规程
    China National Standards
    Ra

    English PDF
    GB/T 19368-2003 TurfgRass seed production standard
    草坪草种子生产技术规程
    China National Standards
    Ra

    English PDF
    GB/T 19364-2003 Machinery forforestry--Wheeled special machines--Vocabulary,performance test methods and criteria for bRake systems
    轮式专用林业机械 制动系统的词汇、性能试验方法和技术条件
    China National Standards
    Ra

    English PDF
    GB/T 14553-2003 Method of gas chromatogRaphic for determination of organophosphorus pesticides in cereals,fruits and vegetables
    粮食、水果和蔬菜中有机磷农药测定的气相色谱法
    China National Standards
    Ra

    English PDF
    GB/T 14552-2003 Method of gas chromatogRaphic for determination of organophosphorus pesticides in water and soil
    水、土中有机磷农药测定的气相色谱法
    China National Standards
    Ra

    English PDF
    GB/T 14551-2003 Method of gas chromatogRaphicfor determination of BHC and DDT in animal and plant tissues
    动、植物中六六六和滴滴涕测定的气相色谱法
    China National Standards
    Ra

    English PDF
    GB/T 14550-2003 Method of gas chromatogRaphic fordetermination of BHC and DDT in soil
    土壤中六六六和滴滴涕测定的气相色谱法
    China National Standards
    Ra

    English PDF
    GB 19377-2003 PaRameters for degradation,sandification and salification of rangelands
    天然草地退化、沙化、盐渍化的分级指标
    China National Standards
    Ra

    English PDF
    GB 19358-2003 Safety code for the packaging of yellow phosphorus--Use appRaisal
    黄磷包装安全规范 使用鉴定
    China National Standards
    Ra

    English PDF
    GB/T 6981-2003 Test methods for water vapor tRansmission of rigid containers
    硬包装容器透湿度试验方法
    China National Standards
    Ra

    English PDF
    GB/T 6524-2003 Metallic powders--Determination of particle size distribution by gRavitational sedimentation in a liquid and attenuation measurement
    金属粉末 粒度分布的测量 重力沉降光透法
    China National Standards
    Ra

    English PDF
    GB/T 15019-2003 Designation and classification of Rapidly quenched metals
    快淬金属分类和牌号
    China National Standards
    Ra

    English PDF
    GB/T 12608-2003 Thermal spRaying--Wires,rods and cords for flame and arc spraying--Classification and technical supply condition
    热喷涂 火焰和电弧喷涂用线材、棒材和芯材 分类和供货技术条件
    China National Standards
    Ra

    English PDF
    GB/T 7777-2003 Measurement and evaluation of mechanical vibRation of displacement compressors
    容积式压缩机机械振动测量与评价
    China National Standards
    Ra

    English PDF
    GB/T 9792-2003 Conversion coatings on metallic materials--Determination of coating mass per unit area--GRavimetric methods
    金属材料上的转化膜 单位面积膜质量的测定 重量法
    China National Standards
    Ra

    English PDF
    GB/T 6071-2003 UltRa-high vacuum flange
    超高真空法兰
    China National Standards
    Ra

    English PDF
    GB/T 4956-2003 Non-magnetic coatings on magnetic substRates--Measurement of coating thickness--Magnetic method
    磁性基体上非磁性覆盖层 覆盖层厚度测量 磁性法
    China National Standards
    Ra

    English PDF
    GB/T 4330-2003 AgricultuRal trailer
    农用挂车
    China National Standards
    Ra

    English PDF
    GB/T 19356-2003 Thermal spRaying--Powders--Composition and technical supply conditions
    热喷涂 粉末 成分和供货技术条件
    China National Standards
    Ra

    English PDF
    GB/T 19352.4-2003 Thermal spRaying--Quality requirements of thermally sprayed structures--Part 4:Elementary quality requirements
    热喷涂 热喷涂结构的质量要求 第4部分:基本的质量要求
    China National Standards
    Ra

    English PDF
    GB/T 19352.3-2003 Thermal spRaying--Quality requirements of thermally sprayed structures--Part 3:Standard qualityrequirements
    热喷涂 热喷涂结构的质量要求 第3部分:标准的质量要求
    China National Standards
    Ra

    English PDF

    Find out:23618Items   |  To Page of: First -Previous-Next -Last  | [200] [201] [202] [203] [204] [205] [206]

     

    +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