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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. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 39813-2021 |
Conveyor belts—Guidelines for storage and handling 输送带 贮存和搬运指南 |
China National Standards Co |
 English PDF |
| GB/T 39809-2021 |
Measuring method of the energy Consumption of flat glass furnace 平板玻璃窑炉能耗测定方法 |
China National Standards Co |
English PDF |
| GB/T 39803-2021 |
Technical regulation of energy Consumption evaluation for flat glass manufacturing 平板玻璃制造能耗评价技术要求 |
China National Standards Co |
English PDF |
| GB/T 39795-2021 |
Conveyor belts for general purpose use—Electrical and flammability safety requirements 普通用途输送带 导电性和可燃性安全要求 |
China National Standards Co |
English PDF |
| GB/T 39789-2021 |
Non-destructive testing of welds—Eddy current-video integrated testing method of metal Composites weld 焊缝无损检测 金属复合材料焊缝涡流视频集成检测方法 |
China National Standards Co |
English PDF |
| GB/T 39787-2021 |
Coordinate system of BeiDou navigation satellite system 北斗卫星导航系统坐标系 |
China National Standards Co |
English PDF |
| GB/T 39780-2021 |
Specifications for evaluating enterprises in waste resource Comprehensive utilization 资源综合利用企业评价规范 |
China National Standards Co |
English PDF |
| GB/T 39779-2021 |
Design guidelines for distributed energy system of Combined cooling, heating and power 分布式冷热电能源系统设计导则 |
China National Standards Co |
English PDF |
| GB/T 39778-2021 |
Technical specification for recycling and utilization of Copper anode mud 铜阳极泥回收利用技术规范 |
China National Standards Co |
English PDF |
| GB/T 39773-2021 |
Energy Consumption test technical regulation for flat glass manufacturing 平板玻璃制造能耗测试技术规程 |
China National Standards Co |
English PDF |
| GB/T 39772.2-2021 |
Technical specification for reference station Construction and acceptance of BeiDou ground-based augmentation system—Part 2：Acceptance specification 北斗地基增强系统基准站建设和验收技术规范 第2部分：验收规范 |
China National Standards Co |
English PDF |
| GB/T 39772.1-2021 |
Technical specification for reference station Construction and acceptance of BeiDou ground-based augmentation system—Part 1：Construction specification 北斗地基增强系统基准站建设和验收技术规范 第1部分：建设规范 |
China National Standards Co |
English PDF |
| GB/T 39769-2021 |
Determination of forms of sulfur in Coke 焦炭中各种形态硫的测定方法 |
China National Standards Co |
English PDF |
| GB/T 39768-2021 |
Classification and Coding for human biomaterial 人类生物样本分类与编码 |
China National Standards Co |
English PDF |
| GB/T 39764-2021 |
Volatile organic Compounds from upholstered furniture—On-site and rapid detection method 软体家具中挥发性有机化合物 现场快速检测方法 |
China National Standards Co |
English PDF |
| GB/T 39763-2021 |
Technical requirements of on-site and rapid Collection equipment of volatile organic compounds from furniture 家具中挥发性有机化合物现场快速采集设备技术要求 |
China National Standards Co |
English PDF |
| GB/T 39762-2021 |
Textile machinery—Opener and cleaner for staple fibres preparation—Vocabulary and principles of Construction 纺织机械 短纤维开松机和清棉机 术语和结构原理 |
China National Standards Co |
English PDF |
| GB/T 39761.1-2021 |
Green product assessment—Household electric appliances—Part 1：Refrigerators, air-Conditioners and washing machines 绿色产品评价 家用电器 第1部分：电冰箱、空调器和洗衣机 |
China National Standards Co |
English PDF |
| GB/T 39757-2021 |
Building Construction machinery and equipment-Code of practice for the safe use of concrete pumps and mobile concrete pumps with placing boom 建筑施工机械与设备 混凝土泵和泵车安全使用规程 |
China National Standards Co |
English PDF |
| GB/T 39755.1-2021 |
Electronic reCords management capability system—Part 1:General requirements 电子文件管理能力体系 第1部分：通用要求 |
China National Standards Co |
English PDF |
| GB/T 39754-2021 |
Hot dip Coating steel sheet and strip for corrugated pipe 波纹管用热镀层钢板及钢带 |
China National Standards Co |
English PDF |
| GB/T 39753-2021 |
General technology requirements for photovoltaic (PV) module recycling and reCovery 光伏组件回收再利用通用技术要求 |
China National Standards Co |
English PDF |
| GB/T 39752-2021 |
Safety requirements and test specifications of electric vehicle Conductive supply equipment 电动汽车供电设备安全要求及试验规范 |
China National Standards Co |
English PDF |
| GB/T 39748.9-2021 |
Urine-absorbing aids for inContinence—Test methods for characterizing polymer-based absorbent materials—Part 9:Gravimetric determination of density 失禁用尿吸收辅助器具 聚合物基质吸液材料特性的测试方法 第9部分：称重法测定密度 |
China National Standards Co |
English PDF |
| GB/T 39748.8-2021 |
Urine-absorbing aids for inContinence—Test methods for characterizing polymer-based absorbent materials—Part 8:Gravimetric determination of flowrate 失禁用尿吸收辅助器具 聚合物基质吸液材料特性的测试方法 第8部分：称重法测定流量 |
China National Standards Co |
English PDF |
| GB/T 39748.7-2021 |
Urine-absorbing aids for inContinence—Test methods for characterizing polymer-based absorbent materials—Part 7:Gravimetric determination of absorption under pressure 失禁用尿吸收辅助器具 聚合物基质吸液材料特性的测试方法 第7部分：称重法测定压力作用下的吸液量 |
China National Standards Co |
English PDF |
| GB/T 39748.6-2021 |
Urine-absorbing aids for inContinence—Test methods for characterizing polymer-based absorbent materials—Part 6:Gravimetric determination of fluid retention capacity in saline solution after centrifugation 失禁用尿吸收辅助器具 聚合物基质吸液材料特性的测试方法 第 6 部分: 称重法测定离心后的生理盐水保液率 |
China National Standards Co |
English PDF |
| GB/T 39748.11-2021 |
Urine-absorbing aids for inContinence—Test methods for characterizing polymer-based absorbent materials—Part 11:Determination of content of respirable particles 失禁用尿吸收辅助器具 聚合物基质吸液材料特性的测试方法 第11部分：可吸入颗粒含量的测定 |
China National Standards Co |
English PDF |
| GB/T 39748.10-2021 |
Urine-absorbing aids for inContinence -- Test methods for characterizing polymer-based absorbent materials -- Part 10: Determination of extractable polymer content by potentiometric titration 失禁用尿吸收辅助器具 聚合物基质吸液材料特性的测定方法 第10部分：电位滴定法测定可萃取聚合物量 |
China National Standards Co |
English PDF |
| GB/T 39747-2021 |
Code of practice for the safe use of supported elevating work platform 举升式升降工作平台安全使用规程 |
China National Standards Co |
English PDF |
| GB/T 39745-2021 |
CNC punching and laser cutting Composite machines 数控冲压激光切割复合机 |
China National Standards Co |
English PDF |
| GB/T 39741.2-2021 |
Plain bearings—Tolerances—Part 2：Tolerances on geometrical characteristics and surface roughness for shafts and thrust Collars 滑动轴承 公差 第2部分：轴和止推轴肩的几何公差及表面粗糙度 |
China National Standards Co |
English PDF |
| GB/T 35060.4-2021 |
General specification of shearer—Part 4: Electric Control system 滚筒采煤机通用技术条件 第4部分:电气控制系统 |
China National Standards Co |
English PDF |
| GB/T 34080.4-2021 |
Security specification of electronic government Common platform based on cloud computing -- Part 4: Application security 基于云计算的电子政务公共平台安全规范 第4部分：应用安全 |
China National Standards Co |
English PDF |
| GB/T 34080.3-2021 |
Security specification of electronic government Common platform based on cloud computing -- Part 3: Service security 基于云计算的电子政务公共平台安全规范 第3部分：服务安全 |
China National Standards Co |
English PDF |
| GB/T 34079.5-2021 |
Service specification of electronic government Common platform based on cloud computing -- Part 5: Mobility service 基于云计算的电子政务公共平台服务规范 第5部分：移动服务 |
China National Standards Co |
English PDF |
| GB/T 34079.4-2021 |
Service specification of electronic government Common platform based on cloud computing -- Part 4: Application service 基于云计算的电子政务公共平台服务规范 第4部分：应用服务 |
China National Standards Co |
English PDF |
| GB/T 34079.2-2021 |
Service specification of electronic government Common platform based on cloud computing -- Part 2: Application deployment and data migration 基于云计算的电子政务公共平台服务规范 第2部分：应用部署和数据迁移 |
China National Standards Co |
English PDF |
| GB/T 34079.1-2021 |
Service specification of electronic government Common platform based on cloud computing -- Part 1: Service catalog and coding 基于云计算的电子政务公共平台服务规范 第1部分：服务分类与编码 |
China National Standards Co |
English PDF |
| GB/T 34078.4-2021 |
General specification of electronic government Common platform based on cloud computing -- Part 4: Service implement 基于云计算的电子政务公共平台总体规范 第4部分：服务实施 |
China National Standards Co |
English PDF |
| GB/T 34078.3-2021 |
General specification of electronic government Common platform based on cloud computing -- Part 3: Service management 基于云计算的电子政务公共平台总体规范 第3部分：服务管理 |
China National Standards Co |
English PDF |
| GB/T 34078.2-2021 |
General specification of electronic government Common platform based on cloud computing -- Part 2: Top-level design guideline 基于云计算的电子政务公共平台总体规范 第2部分：顶层设计导则 |
China National Standards Co |
English PDF |
| GB/T 34077.4-2021 |
Management specification of electronic government Common platform based on cloud computing -- Part 4: Guide for platform management 基于云计算的电子政务公共平台管理规范 第4部分：平台管理导则 |
China National Standards Co |
English PDF |
| GB/T 34077.3-2021 |
Management specification of electronic government Common platformbased on cloud computing -- Part 3: Operation guarantee management 基于云计算的电子政务公共平台管理规范 第3部分：运行保障管理 |
China National Standards Co |
English PDF |
| GB/T 34077.2-2021 |
Management specification of electronic government Common platform based on cloud computing -- Part 2: Services metrics and valuation 基于云计算的电子政务公共平台管理规范 第2部分：服务度量计价 |
China National Standards Co |
English PDF |
| GB/T 33780.5-2021 |
Technical specification of electronic government Common platform based on cloud computing -- Part 5: The architecture for information resource opening and sharing 基于云计算的电子政务公共平台技术规范 第5部分：信息资源开放共享系统架构 |
China National Standards Co |
English PDF |
| GB/T 28847.5-2021 |
Building automation and Control systems—Part 5: Data communication protocol 建筑自动化和控制系统 第5部分：数据通信协议 |
China National Standards Co |
English PDF |
| GB/T 28267.1-2021 |
Steel Cord conveyor belts—Part 1:Design,dimensions and mechanical requirements for conveyor belts for general use 钢丝绳芯输送带 第1部分：普通用途输送带的设计、尺寸和机械要求 |
China National Standards Co |
English PDF |
| GB/T 28170.2-2021 |
Information technology—Computer graphics and image processing—Extensible 3D(X3D)—Part 2: Scene access interface(SAI) 信息技术 计算机图形和图像处理 可扩展三维组件(X3D) 第2部分：场景访问接口(SAI) |
China National Standards Co |
English PDF |
| GB/T 25388.2-2021 |
Wind turbines generator system—Double-fed Converter—Part 2: Test method 风力发电机组 双馈式变流器 第2部分：试验方法 |
China National Standards Co |
English PDF |
| GB/T 25388.1-2021 |
Wind turbines generator system—Double-fed Converter—Part 1: Technical condition 风力发电机组 双馈式变流器 第1部分：技术条件 |
China National Standards Co |
English PDF |
| GB/T 25387.2-2021 |
Wind turbines generator system—Full-power Converter—Part 2:Test method 风力发电机组 全功率变流器 第2部分：试验方法 |
China National Standards Co |
English PDF |
| GB/T 25387.1-2021 |
Wind turbines—Control system—Part 2：Test method 风力发电机组 全功率变流器 第1部分：技术条件 |
China National Standards Co |
English PDF |
| GB/T 25386.2-2021 |
Wind turbines—Control system—Part 2：Test method 风力发电机组 控制系统 第2部分：试验方法 |
China National Standards Co |
English PDF |
| GB/T 25386.1-2021 |
Wind turbines—Control system—Part 1：Technical condition 风力发电机组 控制系统 第1部分：技术条件 |
China National Standards Co |
English PDF |
| GB/T 40377-2021 |
Corrosion of metals and alloys—Determination of AC corrosion—Protection criteria 金属和合金的腐蚀 交流腐蚀的测定 防护准则 |
China National Standards Co |
English PDF |
| GB/T 40376-2021 |
Cement based binder for interior deCoration 室内装修用水泥基胶结料 |
China National Standards Co |
English PDF |
| GB/T 40375-2021 |
Technical specification of Corrosion control operation for metal connection (fastening) structure 金属连接（紧固）结构耐蚀作业技术规范 |
China National Standards Co |
English PDF |
| GB/T 40374-2021 |
Hardmetals—Determination of lead and cadmium Content—Flame atomic absorption spectrometric method and inductively coupled plasma atomic emission spectrometry 硬质合金化学分析方法 铅量和镉量的测定 火焰原子吸收光谱法和电感耦合等离子体原子发射光谱法 |
China National Standards Co |
English PDF |
| GB/T 20311-2021 |
Building Components and building elements—Thermal resistance and thermal transmittance—Calculation methods 建筑构件和建筑单元 热阻和传热系数 计算方法 |
China National Standards Co |
English PDF |
| GB/T 20081.3-2021 |
Pneumatic fluid power—Compressed air pressure regulators and filter-regulators—Part 3:Alternative test methods for measuring the flow-rate characteristics of pressure regulators 气动 减压阀和过滤减压阀 第3部分：测试减压阀流量特性的可选方法 |
China National Standards Co |
English PDF |
| GB/T 20081.2-2021 |
Pneumatic fluid power—Compressed air pressure regulators and filter-regulators—Part 2: Test methods to determine the main characteristics to be included in literature from suppliers 气动 减压阀和过滤减压阀 第 2 部分：评定商务文件中应包含的主要特性的试验方法 |
China National Standards Co |
English PDF |
| GB/T 20081.1-2021 |
Pneumatic fluid power—Compressed air pressure regulators and filter-regulators—Part 1:Main characteristics to be included in literature from suppliers and product-marking requirements 气动 减压阀和过滤减压阀 第1部分：商务文件中应包含的主要特性和产品标识要求 |
China National Standards Co |
English PDF |
| GB/T 19963.1-2021 |
Technical specification for Connecting wind farm to power system—Part 1: On shore wind power 风电场接入电力系统技术规定 第1部分：陆上风电 |
China National Standards Co |
English PDF |
| GB/T 19559-2021 |
Method of determining Coalbed methane content 煤层气含量测定方法 |
China National Standards Co |
English PDF |
| GB/T 19010-2021 |
Quality management—Customer satisfaction—Guidelines for Codes of conduct for organizations 质量管理 顾客满意 组织行为规范指南 |
China National Standards Co |
English PDF |
| GB/T 17651.2-2021 |
Measurement of smoke density of cables or optical fiber cables burning under defined Conditions - Part 2: Test procedure and requirements 电缆或光缆在特定条件下燃烧的烟密度测定 第2部分：试验程序和要求 |
China National Standards Co |
English PDF |
| GB/T 17651.1-2021 |
Measurement of smoke density of cables or optical fiber cables burning under defined Conditions-Part 1:Test apparatus 电缆或光缆在特定条件下燃烧的烟密度测定 第1部分：试验装置 |
China National Standards Co |
English PDF |
| GB/T 17650.2-2021 |
Test on gases evolved during Combustion of materials from cables or optical fiber cables - Part 2: Determination of acidity (by pH measurement) and conductivity 取自电缆或光缆的材料燃烧时释出气体的试验方法 第2部分：酸度（用pH测量）和电导率的测定 |
China National Standards Co |
English PDF |
| GB/T 17650.1-2021 |
Test on gases evolved during Combustion of materials from cables or optical fiber cables-Part 1:Determination of the halogen acid gas content 取自电缆或光缆的材料燃烧时释出气体的试验方法 第1部分：卤酸气体总量的测定 |
China National Standards Co |
English PDF |
| GB/T 17215.211-2021 |
Electricity metering equipment(AC)—General requirements, tests and test Conditions—Part 11：Metering equipment 电测量设备（交流） 通用要求、试验和试验条件 第11部分：测量设备 |
China National Standards Co |
English PDF |
| GB/T 25068.5-2021 |
Information technology—Security techniques—Network security—Part 5: Securing Communications across networks using virtual private networks 信息技术 安全技术 网络安全 第5部分：使用虚拟专用网的跨网通信安全保护 |
China National Standards Co |
English PDF |
| GB/T 20696-2021 |
Lambda-cyhalothrin emulsifiable Concentrate 高效氯氟氰菊酯乳油 |
China National Standards Co |
English PDF |
| GB/T 20645-2021 |
Specific environmental Condition—Technical requirements of low-voltage apparatuses for plateau 特殊环境条件 高原用低压电器技术要求 |
China National Standards Co |
English PDF |
| GB/T 20385.1-2021 |
Textiles—Determination of organotin Compounds—Part 1：Derivatisation method using GC-MS 纺织品 有机锡化合物的测定 第1部分：衍生化气相色谱-质谱法 |
China National Standards Co |
English PDF |
| GB/T 19934.1-2021 |
Hydraulic fluid power—Fatigue pressure testing of metal pressure-Containing envelopes—Part 1: Test method 液压传动 金属承压壳体的疲劳压力试验 第1部分：试验方法 |
China National Standards Co |
English PDF |
| GB/T 19753-2021 |
Test methods for energy Consumption of light-duty hybrid electric vehicles 轻型混合动力电动汽车能量消耗量试验方法 |
China National Standards Co |
English PDF |
| GB/T 19702-2021 |
In vitro diagnostic medical devices -- Measurement of quantities in samples of biological origin -- Requirements for Content and presentation of reference measurement procedures 体外诊断医疗器械 生物源性样品中量的测量 参考测量程序的表述和内容的要求 |
China National Standards Co |
English PDF |
| GB/T 19237-2021 |
Compressed natural gas dispenser for vehicles 汽车用压缩天然气加气机 |
China National Standards Co |
English PDF |
| GB/T 18802.32-2021 |
Low-voltage surge protective devices—Part 32: Surge protective devices Connected to photovoltaic installations—Selection and application principles 低压电涌保护器 第32部分：用于光伏系统的电涌保护器 选择和使用导则 |
China National Standards Co |
English PDF |
| GB/T 18802.31-2021 |
Low-voltage surge protective devices -- Part 31: Surge protective devices Connected to photovoltaic installations -- Requirements and test methods 低压电涌保护器 第31部分：用于光伏系统的电涌保护器 性能要求和试验方法 |
China National Standards Co |
English PDF |
| GB/T 18400.10-2021 |
Test Conditions for machining centres—Part 10：Evaluation of thermal distortions 加工中心检验条件 第10部分：热变形的评定 |
China National Standards Co |
English PDF |
| GB/T 18386.1-2021 |
Test methods for energy Consumption and range of electric vehicles—Part 1: Light-duty vehicles 电动汽车能量消耗量和续驶里程试验方法 第1部分：轻型汽车 |
China National Standards Co |
English PDF |
| GB/T 17421.10-2021 |
Test Code for machine tools -- Part 10: Determination of the measuring performance of probing systems of numerically controlled machine tools 机床检验通则 第10部分：数控机床探测系统测量性能的测定 |
China National Standards Co |
English PDF |
| GB/T 17215.221-2021 |
Electricity metering equipment(a. c. ) -- General requirements, tests and test Conditions -- Part 21: Tariff and load control equipment 电测量设备（交流） 通用要求、试验和试验条件 第21部分：费率和负荷控制设备 |
China National Standards Co |
English PDF |
| GB/T 14352.22-2021 |
Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 22：Determination of antimony Content -- Hydride generation atomic fluorescence spectrometry 钨矿石、钼矿石化学分析方法 第22部分：锑量的测定 氢化物发生-原子荧光光谱法 |
China National Standards Co |
English PDF |
| GB/T 14352.21-2021 |
Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 21: Determination of arsenic Content -- Hydride generation atomic fluorescence spectrometry 钨矿石、钼矿石化学分析方法 第21部分：砷量的测定 氢化物发生-原子荧光光谱法 |
China National Standards Co |
English PDF |
| GB/T 14352.20-2021 |
Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 20：Determination of niobium，tantalum，zirConium，hafnium and 15 rare earth elements content -- Inductively coupled plasma mass spectrometry 钨矿石、钼矿石化学分析方法 第20部分：铌、钽、锆、铪及15个稀土元素量的测定 电感耦合等离子体质谱法 |
China National Standards Co |
English PDF |
| GB/T 14352.19-2021 |
Methods for chemical analysis of tungsten ores and molybdenum ores -- Part 19: Determination of bismuth, cadmium, Cobalt, copper, iron, lithium, nickel, phosphorus, lead, strontium, vanadium and zinc content -- Inductive-coupled plasma atomic emission spe 钨矿石、钼矿石化学分析方法 第19部分：铋、镉、钴、铜、铁、锂、镍、磷、铅、锶、钒和锌量的测定 电感耦合等离子体原子发射光谱法 |
China National Standards Co |
English PDF |
| GB/T 12818-2021 |
Rules for inspecting and testing of railway passenger car after Completion of construction 铁路客车组装后的检查与试验规则 |
China National Standards Co |
English PDF |
| GB/T 12736-2021 |
Conveyor belts—Determination of strenght of mechanical fastenings—Static test method 输送带 机械接头强度的测定 静态试验方法 |
China National Standards Co |
English PDF |
| GB/T 12668.902-2021 |
Adjustable speed electrical power drive systems—Part 9-2: ECodesign for power drive systems, motor starters, power electronics and their driven applications—Energy efficiency indicators for power drive systems and motor starters 调速电气传动系统 第9-2部分：电气传动系统、电机起动器、电力电子设备及其传动应用的生态设计 电气传动系统和电机起动器的能效指标 |
China National Standards Co |
English PDF |
| GB/T 12668.901-2021 |
Adjustable speed electrical power drive systems—Part 9-1: ECodesign for power drive systems, motor starters, power electronics and their driven applications—General requirements for setting energy efficiency standards for power driven equipment using the 调速电气传动系统 第9-1部分：电气传动系统、电机起动器、电力电子设备及其传动应用的生态设计 采用扩展产品法（EPA）和半解析模型（SAM）制定电气传动设备能效标准的一般要求 |
China National Standards Co |
English PDF |
| GB/T 12242-2021 |
Pressure relief devices—Performance test Code 压力释放装置 性能试验方法 |
China National Standards Co |
English PDF |
| GB/T 11313.41-2021 |
Radio-frequency Connectors—Part 41: Sectional specification for CQA series quick lock R.F. coaxial connectors 射频连接器 第41部分: CQA系列快速锁紧射频连接器分规范 |
China National Standards Co |
English PDF |
| GB/T 11313.40-2021 |
Radio-frequency Connectors—Part 40: Sectional specification for 2.4 series R.F. connectors 射频连接器 第40部分: 2.4系列射频连接器分规范 |
China National Standards Co |
English PDF |
| GB/T 11313.35-2021 |
Radio-frequency Connectors—Part 35: Sectional specification for 2.92 series R.F connectors 射频连接器 第35部分: 2.92系列射频连接器分规范 |
China National Standards Co |
English PDF |
| GB/T 10006-2021 |
Plastics—Film and sheeting—Determination of the Coefficients of friction 塑料 薄膜和薄片 摩擦系数的测定 |
China National Standards Co |
English PDF |
| GB/T 7092-2021 |
Outline dimensions of semiConductor integrated circuits 半导体集成电路外形尺寸 |
China National Standards Co |
English PDF |
| GB/T 5755-2021 |
Steel Cord conveyor belts—Cord-to-coating bond test—Initial test and after thermal treatment 钢丝绳芯输送带 绳与包覆胶粘合试验 原始状态下和热老化后试验 |
China National Standards Co |
English PDF |
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