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Standard Code | Standard Title | Standard Class | Order |
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GB/T 40590-2021 |
Specification for operation and maintenance management of electron accelerator facility for radiation processing 辐射加工用电子加速器装置运行维护管理通用规范 |
China National Standards electron |
English PDF |
GB/T 39560.8-2021 |
Determination of certain substances in electrical and electronic products—Part 8:Phthalates in polymers by gas chromatography-mass spectrometry (GC-MS),gas chromatography-mass spectrometry using a pyrolyzer/thermaldesorption accessory (Py/TD-GC-MS) 电子电气产品中某些物质的测定 第8部分:气相色谱-质谱法(GC-MS)与配有热裂解/热脱附的气相色谱-质谱法 (Py/TD-GC-MS)测定聚合物中的邻苯二甲酸酯 |
China National Standards electron |
English PDF |
GB/T 39560.702-2021 |
Determination of certain substances in electrical and electronic products—Part 7-2:Hexavalent chrome—Determination of hexavalent chrome[Cr(VI)]in polymers and electronics by the colormetric method 电子电气产品中某些物质的测定 第7-2部分:六价铬 比色法测定聚合物和电子件中的六价铬[Cr(VI)] |
China National Standards electron |
English PDF |
GB/T 39560.5-2021 |
Determination of certain substances in electrical and electronic products—Part 5: Cadmium,lead and chromium in polymers and electronics and cadmium and lead in metals by AAS,AFS,ICP-OES and ICP-MS 电子电气产品中某些物质的测定 第5部分: AAS、AFS、ICP-OES和ICP-MS法测定聚合物和电子件中镉、铅、铬以及金属中镉、铅的含量 |
China National Standards electron |
English PDF |
GB/T 39560.4-2021 |
Determination of certain substances in electrical and electronic products—Part 4: Mercury in polymers, metals and electronics by CV-AAS, CV-AFS , ICP-OES and ICP-MS 电子电气产品中某些物质的测定 第4部分:CV-AAS、CV-AFS、ICP-OES和ICP-MS测定聚合物、金属和电子件中的汞 |
China National Standards electron |
English PDF |
GB/T 21287-2021 |
electronic specialty gas—Nitrogen trifluoride 电子特气 三氟化氮 |
China National Standards electron |
English PDF |
GB/T 40710-2021 |
Container electronics seal and the system based on NFC 基于NFC的集装箱电子箱封及系统 |
China National Standards electron |
English PDF |
GB/T 3836.32-2021 |
Explosive atmospheres—Part 32:Intrinsically safe systems with electronically controlled spark duration limitation 爆炸性环境 第32部分:电子控制火花时限本质安全系统 |
China National Standards electron |
English PDF |
GB/T 40707-2021 |
Container transportation electronic data interchange—Vessel forecast information message 集装箱运输电子数据交换 船舶预报信息报文 |
China National Standards electron |
English PDF |
GB/T 40708-2021 |
Container transportation electronic data interchange—Container discharge/loading (vessel) report message 集装箱运输电子数据交换 集装箱装卸(船)报告报文 |
China National Standards electron |
English PDF |
GB/T 40705-2021 |
Container transportation electronic data interchange -- Discharging container message 集装箱运输电子数据交换? 放箱单报文 |
China National Standards electron |
English PDF |
GB/T 40706-2021 |
Container transportation electronic data interchange—Booking confirmation message 集装箱运输电子数据交换 订舱确认报文 |
China National Standards electron |
English PDF |
GB/T 40811-2021 |
Container transportation electronic data interchange -- Firm booking message 集装箱运输电子数据交换? 订舱报文 |
China National Standards electron |
English PDF |
GB/T 40812-2021 |
Container transportation electronic data interchange—Container stuffing/stripping message 集装箱运输电子数据交换 装箱单报文 |
China National Standards electron |
English PDF |
GB/T 22432-2021 |
Container transportation electronic data interchange—Vessel call information message 集装箱运输电子数据交换 船舶挂靠信息报文 |
China National Standards electron |
English PDF |
GB/T 22431-2021 |
Container transportation electronic data interchange -- Vessel departure message 集装箱运输电子数据交换 船舶离港报文 |
China National Standards electron |
English PDF |
GB/T 22430-2021 |
Container transportation electronic data interchange—Gate-in/gate-out message 集装箱运输电子数据交换 集装箱进/出门报告报文 |
China National Standards electron |
English PDF |
GB/T 40564-2021 |
Test method of epoxy molding compound for electronic packaging 电子封装用环氧塑封料测试方法 |
China National Standards electron |
English PDF |
GB/T 6346.24-2021 |
Fixed capacitors for use in electronic equipment—Part 24: Sectional specification—Fixed tantalum electrolytic surface mount capacitors with conductive polymer solid electrolyte 电子设备用固定电容器 第24部分:分规范 表面安装导电聚合物固体电解质钽固定电容器 |
China National Standards electron |
English PDF |
GB/T 40562-2021 |
Potentiometers for use in electronic equipment—Part 6:Sectional specification—Surface mount preset potentiometers 电子设备用电位器 第6部分:分规范 表面安装预调电位器 |
China National Standards electron |
English PDF |
GB/T 40663-2021 |
Guidelines for environmental performance evaluation in electrical and electronic enterprises 电工电子企业环境绩效评价指南 |
China National Standards electron |
English PDF |
GB/T 5169.9-2021 |
Fire hazard testing for electric and electronic products—Part 9:Guidance for assessing the fire hazard—Preselection testing procedures—General guidelines 电工电子产品着火危险试验 第9部分:着火危险评定导则 预选试验程序 总则 |
China National Standards electron |
English PDF |
GB/T 5169.2-2021 |
Fire hazard testing for electric and electronic products—Part 2: Guidance for assessing the fire hazard—General guidelines 电工电子产品着火危险试验 第2部分:着火危险评定导则 总则 |
China National Standards electron |
English PDF |
GB 39731-2020 |
Discharge standard of water pollutants for electronic industry 电子工业水污染物排放标准 |
China National Standards electron |
English PDF |
GB/T 39063-2020 |
Consumer product recall—Risk assessment for electronics and electrical appliances 消费品召回 电子电器风险评估 |
China National Standards electron |
English PDF |
GB/T 39058-2020 |
The specification of quality management for supply chain on electronic commerce of agricultural products 农产品电子商务供应链质量管理规范 |
China National Standards electron |
English PDF |
GB/T 34077.5-2020 |
Management specification of electronic government common platform based on cloud computing—Part 5:Technical service system 基于云计算的电子政务公共平台管理规范 第5部分:技术服务体系 |
China National Standards electron |
English PDF |
GB/T 20818.12-2020 |
Industrial-process measurement and control—Data structures and elements in process equipment catalogues—Part 12:Lists of properties (LOPs) for flow measuring equipment for electronic data exchange 工业过程测量和控制 过程设备目录中的数据结构和元素 第12部分:流量测量设备电子数据交换用属性列表(LOPs) |
China National Standards electron |
English PDF |
GB/T 20818.21-2020 |
Industrial-process measurement and control—Data structures and elements in process equipment catalogues—Part 21: List of properties (LOP) for automated valves for electronic data exchange—Generic structures 工业过程测量和控制 过程设备目录中的数据结构和元素 第21部分:自动阀电子数据交换用属性列表(LOP) 通用结构 |
China National Standards electron |
English PDF |
GB/T 15144-2020 |
AC and/or DC-supplied electronic control gear for tubular fluorescent lamps—Performance requirements 管形荧光灯用交流和/或直流电子控制装置 性能要求 |
China National Standards electron |
English PDF |
GB/T 38866-2020 |
Dichlorosilane for electronic industry 电子工业用二氯硅烷 |
China National Standards electron |
English PDF |
GB/T 38867-2020 |
Silicon tetrachloride for electronic industry 电子工业用四氯化硅 |
China National Standards electron |
English PDF |
GB/T 38783-2020 |
Method of coating thickness determination for precious metal composites by scanning electron microscope 贵金属复合材料覆层厚度的扫描电镜测定方法 |
China National Standards electron |
English PDF |
GB/T 27788-2020 |
Microbeam analysis—Scanning electron microscopy—Guidelines for calibrating image magnification 微束分析 扫描电镜 图像放大倍率校准导则 |
China National Standards electron |
English PDF |
GB/T 17360-2020 |
Microbeam analysis—Method of quantitative determination for low contents of silicon and manganese in steels using electron probe microanalyzer 微束分析 钢中低含量硅、锰的电子探针定量分析方法 |
China National Standards electron |
English PDF |
GB/T 31309-2020 |
Calculation of electron vacancy number in cast superalloys 铸造高温合金电子空位数计算方法 |
China National Standards electron |
English PDF |
GB/T 38776-2020 |
Classification and codes for electronic commerce software component 电子商务软件构件分类与代码 |
China National Standards electron |
English PDF |
GB/T 5095.2509-2020 |
Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-9: Signal integrity tests-Test 25i: Alien crosstalk 电子设备用机电元件 基本试验规程及测量方法 第25-9部分:信号完整性试验 试验25i:外来串扰 |
China National Standards electron |
English PDF |
GB/T 5095.2506-2020 |
Electromechanical components for electronic equipment—Basic testing procedures and measuring methods—Part 25-6:Test 25f:Eye pattern and jitter 电子设备用机电元件 基本试验规程及测量方法 第25-6部分:试验25f:眼图和抖动 |
China National Standards electron |
English PDF |
GB/T 38628-2020 |
Information security technology—Cybersecurity guide for automotive electronics systems 信息安全技术 汽车电子系统网络安全指南 |
China National Standards electron |
English PDF |
GB/T 38603-2020 |
Safety and control devices for gas burners and gas-burning appliances—Particular requirements—electronic controller 燃气燃烧器和燃烧器具用安全和控制装置 特殊要求 电子控制器 |
China National Standards electron |
English PDF |
GB/T 38659.1-2020 |
Electromagnetic compatibility—Risk assessment—Part 1:electronic and electrical device 电磁兼容 风险评估 第1部分:电子电气设备 |
China National Standards electron |
English PDF |
GB/T 38532-2020 |
Microbeam analysis—electron backscatter diffraction—Measurement of average grain size 微束分析 电子背散射衍射 平均晶粒尺寸的测定 |
China National Standards electron |
English PDF |
GB/T 38541-2020 |
Information security technology—Guidance of cryptographic application for electronic records 信息安全技术 电子文件密码应用指南 |
China National Standards electron |
English PDF |
GB/T 38540-2020 |
Information security technology—Technical specification secure electronic seal signature cryptography 信息安全技术 安全电子签章密码技术规范 |
China National Standards electron |
English PDF |
GB 9706.201-2020 |
Medical electrical equipment—Part 2-1: Particular requirements for the basic safety and essential performance of electron accelerators in the range 1 MeV to 50 MeV 医用电气设备 第2-1部分:能量为1MeV至50MeV电子加速器基本安全和基本性能专用要求 |
China National Standards electron |
English PDF |
GB/T 39722-2020 |
Superconducting electronic devices—Generic specification for sensors and detectors 超导电子器件 传感器和探测器通用规范 |
China National Standards electron |
English PDF |
GB/T 39676-2020 |
Cross-border electronic commerce—Electronic document for logistics information and payment information declaration 跨境电子商务 物流信息申报和支付信息申报电子单证 |
China National Standards electron |
English PDF |
GB/T 39673.53-2020 |
Home and building electronic systems (HBES) and building automation and control systems (BACS)—Part 53: EMC requirements for HBES/BACS used in industrial environments 住宅和楼宇电子系统(HBES)及楼宇自动化和控制系统(BACS) 第53部分:用于工业环境下的HBES和BACS的EMC要求 |
China National Standards electron |
English PDF |
GB/T 39673.52-2020 |
Home and building electronic systems (HBES) and building automation and control systems (BACS)—Part 52: EMC requirements for HBES/BACS used in residential, commercial and light-industrial environments 住宅和楼宇电子系统(HBES)及楼宇自动化和控制系统(BACS) 第52部分:用于住宅、商业和轻工业环境下的HBES和BACS的EMC要求 |
China National Standards electron |
English PDF |
GB/T 39673.51-2020 |
Home and building electronic systems (HBES) and building automation and control systems (BACS) —Part 51: EMC requirements, conditions and test set-up 住宅和楼宇电子系统(HBES)及楼宇自动化和控制系统(BACS) 第51部分:EMC要求、条件和测试布置 |
China National Standards electron |
English PDF |
GB/T 39673.3-2020 |
Home and building electronic systems (HBES) and building automation and control systems (BACS)—Part 3: Electrical safety requirements 住宅和楼宇电子系统(HBES)及楼宇自动化和控制系统(BACS) 第3部分:电气安全要求 |
China National Standards electron |
English PDF |
GB/T 39673.1-2020 |
Home and building electronic systems (HBES) and building automation and control systems (BACS) — Part 1: General requirements 住宅和楼宇电子系统(HBES)及楼宇自动化和控制系统(BACS) 第1部分:通用要求 |
China National Standards electron |
English PDF |
GB/T 39585-2020 |
Opto-electronic measurement—Performance requirements and test methods of light distribution measurement system 光电测量 配光测试系统的性能要求和检测方法 |
China National Standards electron |
English PDF |
GB/T 39584-2020 |
Programming interface specification of middleware for developing navigation electronic map application 导航电子地图应用开发中间件接口规范 |
China National Standards electron |
English PDF |
GB/T 39570-2020 |
Requirements for image display of electronic commerce transaction product 电子商务交易产品图像展示要求 |
China National Standards electron |
English PDF |
GB/T 39560.701-2020 |
Determination of certain substances in electrical and electronic products—Part 7-1:Hexavalent chromium—Presence of hexavalent chromium [Cr(VI)] in colourless and coloured corrosion-protected coatings on metals by the colorimetric method 电子电气产品中某些物质的测定 第7-1部分:六价铬 比色法测定金属上无色和有色防腐镀层中的六价铬[Cr(VI)] |
China National Standards electron |
English PDF |
GB/T 39560.6-2020 |
Determination of certain substances in electrical and electronic products—Part 6: Polybrominated biphenyls and polybrominated diphenyl ethers in polymers by gas chromatography-mass spectrometry(GC-MS) 电子电气产品中某些物质的测定 第6部分:气相色谱-质谱仪(GC-MS)测定聚合物中的多溴联苯和多溴二苯醚 |
China National Standards electron |
English PDF |
GB/T 39560.301-2020 |
Determination of certain substances in electrical and electronic products—Part 3-1: Screening lead, mercury, cadmium, total chromium and total bromine by X-ray fluorescence spectrometry 电子电气产品中某些物质的测定 第3-1部分:X射线荧光光谱法筛选铅、汞、镉、总铬和总溴 |
China National Standards electron |
English PDF |
GB/T 39560.2-2020 |
Determination of certain substances in electrical and electronic products—Part 2: Disassembly,disjointment and mechanical sample preparation 电子电气产品中某些物质的测定 第2部分:拆解、拆分和机械制样 |
China National Standards electron |
English PDF |
GB/T 39560.1-2020 |
Determination of certain substances in electrical and electronic products—Part 1: Introduction and overview 电子电气产品中某些物质的测定 第1部分:介绍和概述 |
China National Standards electron |
English PDF |
GB/T 33014.9-2020 |
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 9:Portable transmitters 道路车辆 电气/电子部件对窄带辐射电磁能的抗扰性试验方法 第9部分:便携式发射机法 |
China National Standards electron |
English PDF |
GB/T 33014.8-2020 |
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 8:Immunity to magnetic fields 道路车辆 电气/电子部件对窄带辐射电磁能的抗扰性试验方法 第8部分:磁场抗扰法 |
China National Standards electron |
English PDF |
GB/T 33014.7-2020 |
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 7:Direct radio frequency power injection 道路车辆 电气/电子部件对窄带辐射电磁能的抗扰性试验方法 第7部分:射频功率直接注入法 |
China National Standards electron |
English PDF |
GB/T 33014.10-2020 |
Road vehicles—Component test methods for electrical/electronic disturbances from narrowband radiated electromagnetic energy—Part 10: Immunity to conducted disturbances in the extended audio frequency range 道路车辆 电气/电子部件对窄带辐射电磁能的抗扰性试验方法 第10部分:扩展音频范围的传导抗扰法 |
China National Standards electron |
English PDF |
GB/T 15092.102-2020 |
Switches for appliances—Part 1-2: Requirements for electronic switches 器具开关 第1-2部分:电子开关要求 |
China National Standards electron |
English PDF |
GB/T 39459-2020 |
Specification for international trade business data—electronic certification interchange for inspection and quarantine 国际贸易业务数据规范 检验检疫电子证书数据交换 |
China National Standards electron |
English PDF |
GB/T 39362-2020 |
Archiving specification for electronic official document of party and government organs 党政机关电子公文归档规范 |
China National Standards electron |
English PDF |
GB/T 39342-2020 |
Aerospace electronic products—General specification for printed circuit board 宇航电子产品 印制电路板总规范 |
China National Standards electron |
English PDF |
GB/T 39340-2020 |
Aerospace electronic time deterministic network protocol 宇航电子时间确定性网络协议 |
China National Standards electron |
English PDF |
GB/T 39326-2020 |
International trade business process specification—electronic certificates interchange for inspection and quarantine 国际贸易业务流程规范 检验检疫电子证书数据交换 |
China National Standards electron |
English PDF |
GB/T 39321-2020 |
Specification for electronic contract forensics process 电子合同取证流程规范 |
China National Standards electron |
English PDF |
GB/T 39320-2020 |
electronic business—Meta model—Foundation module 电子商务 元模型 基本模块 |
China National Standards electron |
English PDF |
GB/T 39319-2020 |
Coding rules of identification for electronic commerce entity 电子商务交易主体统一标识编码规则 |
China National Standards electron |
English PDF |
GB/T 39275-2020 |
Power electronics systems and equipment—Operation conditions and characteristics of active infeed converter (AIC) applications 电力电子系统和设备 有源馈电变流器(AIC)应用的运行条件和特性 |
China National Standards electron |
English PDF |
GB/T 39273-2020 |
Rolling bearings and spherical plain bearings—Search structure for electronic media—Characteristics and performance criteria identified by property vocabulary 滚动轴承和关节轴承 电子媒体查询结构 用特性词汇标识的特征和性能指标 |
China National Standards electron |
English PDF |
GB/T 19520.19-2020 |
Mechanical structures for electronic equipment—Dimensions of mechanical structures of the 482.6 mm (19 in) series—Part 3-107: Dimensions of subracks and plug-in units, small form factor 电子设备机械结构 482.6 mm(19 in)系列机械结构尺寸 第3-107部分:小型化插箱和插件的尺寸 |
China National Standards electron |
English PDF |
GB/T 18663.3-2020 |
Mechanical structures for electronic equipment—Tests for metric and inch system—Part 3: Electromagnetic shielding performance tests for cabinets and subracks 电子设备机械结构 公制系列和英制系列的试验 第3部分:机柜和插箱的电磁屏蔽性能试验 |
China National Standards electron |
English PDF |
GB/T 7722-2020 |
electronic portable platform and bench scale 电子台案秤 |
China National Standards electron |
English PDF |
GB/T 5169.5-2020 |
Fire hazard testing for electric and electronic products—Part 5: Test flames—Needle-flame test method—Apparatus, confirmatory test arrangement and guidance 电工电子产品着火危险试验 第5部分:试验火焰 针焰试验方法 装置、确认试验方法和导则 |
China National Standards electron |
English PDF |
GB/T 5169.46-2020 |
Fire hazard testing for electric and electronic products—Part 46: Test flames—Determination of the characteristic heat flux for ignition from a non-contacting flame source 电工电子产品着火危险试验 第46部分:试验火焰 非接触火焰源中起燃时特征热通量的测定 |
China National Standards electron |
English PDF |
GB/T 5169.30-2020 |
Fire hazard testing for electric and electronic products—Part 30: Heat release—Summary and relevance of test methods 电工电子产品着火危险试验 第30部分:热释放 试验方法概要和相关性 |
China National Standards electron |
English PDF |
GB/T 5169.29-2020 |
Fire hazard testing for electric and electronic products—Part 29: Heat release—General guidance 电工电子产品着火危险试验 第29部分:热释放 总则 |
China National Standards electron |
English PDF |
GB/T 39408-2020 |
electronic jetting dispenser robot system—General specifications 电子喷胶机器人系统 通用技术条件 |
China National Standards electron |
English PDF |
GB/T 39488-2020 |
Safety and control devices for gas burners and gas-burning appliances—Particular requirements—electronic type gas and air ratio control system 燃气燃烧器和燃烧器具用安全和控制装置 特殊要求 电子式燃气与空气比例控制系统 |
China National Standards electron |
English PDF |
GB/T 28029.9-2020 |
electronic railway equipment—Train communication network(TCN)—Part 3-1: Multifunction Vehicle Bus(MVB) 轨道交通电子设备 列车通信网络(TCN) 第3-1部分:多功能车辆总线(MVB) |
China National Standards electron |
English PDF |
GB/T 28029.12-2020 |
electronic railway equipment—Train communication network (TCN)—Part 3-4: Ethernet Consist Network(ECN) 轨道交通电子设备 列车通信网络(TCN) 第3-4部分:以太网编组网(ECN) |
China National Standards electron |
English PDF |
GB/T 28029.11-2020 |
electronic railway equipment—Train communication network(TCN)—Part 3-3:CANopen Consist Network(CCN) 轨道交通电子设备 列车通信网络(TCN) 第3-3部分:CANopen编组网(CCN) |
China National Standards electron |
English PDF |
GB/T 28029.10-2020 |
electronic railway equipment—Train communication network(TCN)—Part 3-2:Multifunction Vehicle Bus(MVB)conformance testing 轨道交通电子设备 列车通信网络(TCN) 第3-2部分:多功能车辆总线(MVB)一致性测试 |
China National Standards electron |
English PDF |
GB/T 28029.8-2020 |
electronic railway equipment—Train communication network (TCN)—Part 2-7: Radio based Wireless Train Backbone (WLTB) 轨道交通电子设备 列车通信网络(TCN) 第2-7部分:基于电台的无线列车骨干网(WLTB) |
China National Standards electron |
English PDF |
GB/T 28029.7-2020 |
electronic railway equipment—Train communication network (TCN)—Part 2-6: On-board to ground communication 轨道交通电子设备 列车通信网络(TCN) 第2-6部分:车地通信 |
China National Standards electron |
English PDF |
GB/T 28029.6-2020 |
electronic railway equipment—Train communication network (TCN)—Part 2-5: Ethernet Train Backbone(ETB) 轨道交通电子设备 列车通信网络(TCN) 第2-5部分:以太网列车骨干网(ETB) |
China National Standards electron |
English PDF |
GB/T 28029.5-2020 |
electronic railway equipment—Train communication network (TCN)—Part 2-4: TCN application profile 轨道交通电子设备 列车通信网络(TCN) 第2-4部分:TCN应用规约 |
China National Standards electron |
English PDF |
GB/T 28029.4-2020 |
electronic railway equipment—Train communication network (TCN)—Part2-3: TCN communication profile 轨道交通电子设备 列车通信网络(TCN) 第2-3部分:TCN通信规约 |
China National Standards electron |
English PDF |
GB/T 28029.3-2020 |
electronic railway equipment—Train communication network (TCN)—Part2-2: Wire Train Bus(WTB)conformance testing 轨道交通电子设备 列车通信网络(TCN) 第2-2部分:绞线式列车总线(WTB)一致性测试 |
China National Standards electron |
English PDF |
GB/T 28029.2-2020 |
Rail transit electronics Train communication network (TCN) Part 2-1: Stranded train bus (WTB) 轨道交通电子设备 列车通信网络(TCN) 第2-1部分:绞线式列车总线(WTB) |
China National Standards electron |
English PDF |
GB/T 28029.1-2020 |
electronic railway equipment--Train communication network (TCN)--Part 1: General architecture 轨道交通电子设备 列车通信网络(TCN) 第1部分:基本结构 |
China National Standards electron |
English PDF |
GB 51401-2019 |
Standard for design of electronic industry emissions treatment engineering 电子工业废气处理工程设计标准 |
China National Standards electron |
English PDF |
GB/T 38333-2019 |
Radio frequency identification (RFID) for lead-acid battery electronic tags technical specification 铅酸蓄电池用射频识别(RFID)电子标签技术规范 |
China National Standards electron |
English PDF |
GB/T 38293-2019 |
Ships and marine technology—Computer applications—General principles for the development and use of programmable electronic systems in marine applications 船舶和海上技术 计算机应用 船用可编程电子系统开发及使用总则 |
China National Standards electron |
English PDF |
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