China National Standards

China Ne 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 "Ne" GB Standards English PDF List:
  • Standard  Code Standard Title Standard Class Order
    GB/T 39857-2021 Specification of photovoltaic power geNeration efficiency
    光伏发电效率技术规范
    China National Standards
    Ne

    English PDF
    GB/T 39851.2-2021 Road vehicles—Diagnostic communication over Controller Area Network (DoCAN) —Part 2:Transport protocol and network layer services
    道路车辆 基于控制器局域网的诊断通信 第2部分:传输层协议和网络层服务
    China National Standards
    Ne

    English PDF
    GB/T 39850-2021 Core compoNents business document assembly technical specification for international trade
    国际贸易核心构件业务单证集成技术规范
    China National Standards
    Ne

    English PDF
    GB/T 39848-2021 Methods of measurement for flat paNel display color gamut
    平板显示器色域测量方法
    China National Standards
    Ne

    English PDF
    GB/T 39847-2021 Verification test methods of access satellite Network for FSS communication earth station
    固定卫星通信业务地球站进入卫星网络的验证测试方法
    China National Standards
    Ne

    English PDF
    GB/T 39846-2021 LTE-based broadband trunking communication (B-TrunC) system—Test methods for interface (Phase 1)—Interface between trunking core Network and dispach console
    基于LTE技术的宽带集群通信(B-TrunC)系统 接口测试方法(第一阶段) 集群核心网到调度台接口
    China National Standards
    Ne

    English PDF
    GB/T 39845-2021 LTE-based broadband trunking communication(B-TrunC) system—Technical requirements for Network equipments(Phase 1)
    基于LTE技术的宽带集群通信(B-TrunC)系统 网络设备技术要求(第一阶段)
    China National Standards
    Ne

    English PDF
    GB/T 39838-2021 LTE-based broadband trunking communication (B-TrunC) system—Test methods for interface (Phase 1)—Interface between UE and trunking core Network
    基于LTE技术的宽带集群通信(B-TrunC)系统 接口测试方法(第一阶段) 终端到集群核心网接口
    China National Standards
    Ne

    English PDF
    GB/T 39833-2021 Test method for coal combustion characteristics—ONe-dimensional furnaces method
    煤的燃烧特性测定方法 一维炉法
    China National Standards
    Ne

    English PDF
    GB/T 39832-2021 Gardening machiNery—Powered material-collecting systems—Safety
    园艺机械 物料动力收集装置 安全
    China National Standards
    Ne

    English PDF
    GB/T 39827.2-2021 Plastics -- Post-consumer poly(ethyleNe terephthalate)(PET) bottle recyclates -- Part 2: Preparation of test specimens and determination properties
    塑料 用过的聚对苯二甲酸乙二醇酯(PET)瓶回收物 第2部分:试样制备和性能测定
    China National Standards
    Ne

    English PDF
    GB/T 39827.1-2021 Plastics -- Post-consumer poly(ethyleNe terephthalate) (PET) bottle recyclates -- Part 1: Designation system and basis for specifications
    塑料 用过的聚对苯二甲酸乙二醇酯(PET)瓶回收物 第1部分:命名系统和分类基础
    China National Standards
    Ne

    English PDF
    GB/T 39822-2021 Plastics—Determination of yellowNess index and change in yellowness index
    塑料 黄色指数及其变化值的测定
    China National Standards
    Ne

    English PDF
    GB/T 39821-2021 Plastics—Determination of apparent density of moulding material that cannot be poured from a specified funNel
    塑料 不能从规定漏斗流出的模塑材料表观密度的测定
    China National Standards
    Ne

    English PDF
    GB/T 39813-2021 Conveyor belts—GuideliNes for storage and handling
    输送带 贮存和搬运指南
    China National Standards
    Ne

    English PDF
    GB/T 39811-2021 Equipment nomenclature and sorted and numbering for stoNe industry
    石材工业用设备术语和分类及型号编制方法
    China National Standards
    Ne

    English PDF
    GB/T 39808-2021 Design specification for external membraNe filtration system of drinking water
    生活饮用水外置式膜过滤系统设计规范
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39801-2021 GeNeral technical specifications of membrane distillation device for seawater and brackish water desalination
    海水或苦咸水淡化用膜蒸馏装置通用技术规范
    China National Standards
    Ne

    English PDF
    GB/T 39796-2021 Test method for airboNe sound insulating properties of glass used on multipe units
    动车组玻璃隔声性能试验方法
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39788-2021 System and software engiNeering—Performance testing method
    系统与软件工程 性能测试方法
    China National Standards
    Ne

    English PDF
    GB/T 39786-2021 Information security technology—BaseliNe for information system cryptography application
    信息安全技术 信息系统密码应用基本要求
    China National Standards
    Ne

    English PDF
    GB/T 39784-2021 GeNeral functional requirements for electronic archive management system
    电子档案管理系统通用功能要求
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39777-2021 Technical requirements of measurement and verification of eNergy savings—Industrial boiler system
    节能量测量和验证技术要求 工业锅炉系统
    China National Standards
    Ne

    English PDF
    GB/T 39776-2021 Measuring and calculating methods of heat balance and heat efficiency of tunNel kiln of brick industrial
    砖瓦工业隧道窑热平衡、热效率测定与计算方法
    China National Standards
    Ne

    English PDF
    GB/T 39775-2021 GeNeral principle for energy management performance assessment
    能源管理绩效评价导则
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39765-2021 Determination of benzeNe,methylbenzene,ethylbenzene,dimethybenzene in stationery—Gas chromatographic method
    文具中苯、甲苯、乙苯及二甲苯的测定方法 气相色谱法
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39760-2021 Laboratory animal-GuideliNes for euthanasia
    实验动物 安乐死指南
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39746-2021 NC bus processing machiNe
    数控母线加工机
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39744-2021 GeNeral requirements of mechanical product electronic manual based on three-dimensional model
    基于三维模型的机械产品电子手册编制通用要求
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 39693.3-2021 Rubber, vulcanized or thermoplastic—Determination of hardNess—Part 3:Dead-load hardness using the very low rubber hardness (VLRH) scale
    硫化橡胶或热塑性橡胶 硬度的测定 第3部分:用超低橡胶硬度(VLRH)标尺 测定定试验力硬度
    China National Standards
    Ne

    English PDF
    GB/T 39644-2021 Plain bearings—Technical specifications for Tin-based alloy plain bearings of rotating machiNery
    滑动轴承 旋转机械用锡基合金轴承技术条件
    China National Standards
    Ne

    English PDF
    GB/T 39600-2021 Formaldehyde emission grading for wood-based paNel and finishing products
    人造板及其制品甲醛释放量分级
    China National Standards
    Ne

    English PDF
    GB/T 39598-2021 A guide to the limited quantity in indoor loading for wood-based paNel based on its ultimate formaldehyde emission
    基于极限甲醛释放量的人造板室内承载限量指南
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 33770.6-2021 Information technology service—Outsourcing—Part 6:GeNeral requirements for service acquirer
    信息技术服务 外包 第6部分:服务需求方通用要求
    China National Standards
    Ne

    English PDF
    GB/T 30027-2021 Round steel short link chains for lifting purposes—FiNe tolerance hoist chains for hand operated chain hoists—Grade VH
    起重用钢制短环链 手动链式葫芦用高精度链 VH级
    China National Standards
    Ne

    English PDF
    GB/T 30026-2021 Round steel short link chains for lifting purposes—FiNe tolerance hoist chains for hand operated chain hoists—Grade TH
    起重用钢制短环链 手动链式葫芦用高精度链 TH级
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 23314-2021 Neckties
    领带
    China National Standards
    Ne

    English PDF
    GB/T 20833.4-2021 Rotating electrical machiNes—The winding insulation—Part 4: Measurement of insulation resistance and polarization index
    旋转电机 绕组绝缘 第4部分:绝缘电阻和极化指数测量
    China National Standards
    Ne

    English PDF
    GB/T 20833.1-2021 Rotating electrical machiNes—The winding insulation—Part 1:Off-line partial discharge measurements
    旋转电机 绕组绝缘 第1部分:离线局部放电测量
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 19672-2021 PipeliNe valves—Technical specification
    管线阀门 技术条件
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 18638-2021 Diagnostic techniques for JapaNese encephalitis
    流行性乙型脑炎诊断技术
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 18329.4-2021 Plain bearings—Metallic multilayer plain bearings—Part 4:Non-destructive ultrasonic transmission testing of bond of thickNess greater than or equal to 0.3 mm
    滑动轴承 多层金属滑动轴承 第4部分: 合金厚度≥0.3mm的结合质量超声穿透无损检测
    China National Standards
    Ne

    English PDF
    GB/T 18329.3-2021 Plain bearings—Metallic multilayer plain bearings—Part 3: Non-destructive peNetrant testing
    滑动轴承 多层金属滑动轴承 第3部分:无损渗透检验
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 15914-2021 Monitoring and testing method for eNergy saving of steam heating equipments
    蒸汽加热设备节能监测方法
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 12975-2021 GeNeral specification for synchronous generator in ships
    船用同步发电机通用技术条件
    China National Standards
    Ne

    English PDF
    GB/T 12817-2021 GeNeral technical specification for railway passenger car
    铁路客车通用技术条件
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 12241-2021 Safety valves—GeNeral requirements
    安全阀 一般要求
    China National Standards
    Ne

    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
    Ne

    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
    Ne

    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
    Ne

    English PDF
    GB/T 7308.2-2021 Plain bearings—Thin-walled half bearings with or without flange—Part 2:Measurement of wall thickNess and flange thickness
    滑动轴承 有法兰或无法兰薄壁轴瓦 第2部分:轴瓦壁厚和法兰厚度测量
    China National Standards
    Ne

    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
    Ne

    English PDF
    GB/T 5095.2507-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 25-7: Test 25g: Impedance, reflection coefficient, and voltage standing wave ratio (VSWR)
    电子设备用机电元件 基本试验规程及测量方法 第25-7部分:试验25g:阻抗、反射系数和电压驻波比(VSWR)
    China National Standards
    Ne

    English PDF
    GB/T 5095.2505-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 25-5:Test 25e: Return loss
    电子设备用机电元件 基本试验规程及测量方法 第25-5部分:试验25e:回波损耗
    China National Standards
    Ne

    English PDF
    GB/T 5095.2504-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 25-4: Test 25d: Propagation delay
    电子设备用机电元件 基本试验规程及测量方法 第25-4部分:试验25d:传输时延
    China National Standards
    Ne

    English PDF
    GB/T 5095.2503-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 25-3: Test 25c: Rise time degradation
    电子设备用机电元件 基本试验规程及测量方法 第25-3部分:试验25c:上升时间衰减
    China National Standards
    Ne

    English PDF
    GB/T 5095.2502-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 25-2: Test 25b: Attenuation (insertion loss)
    电子设备用机电元件 基本试验规程及测量方法 第25-2部分:试验25b:衰减(插入损耗)
    China National Standards
    Ne

    English PDF
    GB/T 5095.2501-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 25-1: Test 25a: Crosstalk ratio
    电子设备用机电元件 基本试验规程及测量方法 第25-1部分:试验25a:串扰比
    China National Standards
    Ne

    English PDF
    GB/T 5095.2307-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 23-7: Screening and filtering tests—Test 23g: Effective transfer impedance of connectors
    电子设备用机电元件 基本试验规程及测量方法 第23-7部分:屏蔽和滤波试验 试验23g:连接器的有效转移阻抗
    China National Standards
    Ne

    English PDF
    GB/T 5095.2304-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 23-4: Screening and filtering tests—Test 23d: Transmission line reflections in the time domain
    电子设备用机电元件 基本试验规程及测量方法 第23-4部分:屏蔽和滤波试验 试验23d:时域内传输线的反射
    China National Standards
    Ne

    English PDF
    GB/T 5095.2303-2021 Electromechanical compoNents for electronic equipment—Basic testing procedures and measuring methods—Part 23-3:Screening and filtering tests—Test 23c:Shielding effectiveness of connectors and accessories—Line injection method
    电子设备用机电元件 基本试验规程及测量方法 第23-3部分:屏蔽和滤波试验 试验23c:连接器和附件的屏蔽效果 线注入法
    China National Standards
    Ne

    English PDF
    GB/T 4022.1-2021 Surface grinding machiNes with horizontal grinding wheel spindle and reciprocating table—Testing of the accuracy—Part 1:Machines with table surface length of up to 1600 mm
    卧轴矩台平面磨床 精度检验 第1部分:工作台面长度至1600mm的机床
    China National Standards
    Ne

    English PDF
    GB/T 2680-2021 Glass in building—Determination of light transmittance, solar direct transmittance, total solar eNergy transmittance, ultraviolet transmittance and related glazing factors
    建筑玻璃 可见光透射比、太阳光直接透射比、太阳能总透射比、紫外线透射比及有关窗玻璃参数的测定
    China National Standards
    Ne

    English PDF
    GB/T 1149.6-2021 Internal combustion engiNes—Piston rings—Part 6: Scraper rings made of cast iron
    内燃机 活塞环 第6部分:铸铁刮环
    China National Standards
    Ne

    English PDF
    GB/T 1149.4-2021 Internal combustion engiNes—Piston rings—Part 4:Quality requirements
    内燃机 活塞环 第4部分:质量要求
    China National Standards
    Ne

    English PDF
    GB/T 41165-2021 Accuracy evaluation methods of mariNe forecast results
    海洋预报结果准确性检验评估方法
    China National Standards
    Ne

    English PDF
    GB/T 14914.6-2021 The specification for mariNe observation—Part 6:Data processing and quality control of marine observational data
    海洋观测规范 第6部分:数据处理与质量控制
    China National Standards
    Ne

    English PDF
    GB/T 14914.3-2021 The specification for mariNe observation -- Part 3: Surface and subsurface buoy-based observation
    海洋观测规范 第 3 部分:浮标潜标观测
    China National Standards
    Ne

    English PDF
    GB/T 14914.4-2021 The specification for mariNe observation—Part 4:Shore based radar observation
    海洋观测规范 第4部分:岸基雷达观测
    China National Standards
    Ne

    English PDF

    Find out:19761Items   |  To Page of: First -Previous-Next -Last  | [23] [24] [25] [26] [27] [28] [29]

     

    +86-755-25831330        [email protected] 
    106# Zhongmao Mansion,No.1 Beizhan Road,Shenzhen,China
    ©  RJS Copyright  2001-2025 All Rights Reserved

    - Since 2001 -
    Focus on China Standards & Compliance Services

    www.gbstandards.org

    China National Standards