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IEC 60487-2-1-1981 Methods of measurement for equipment used in terrestrial radio-relay systems Part 2 Measurements for sub-systems Section One - General《地面无线电中继系统所用设备的测量方法 第2部分 分系统测量 第1节 总则》.pdf 12

IEC 60487-2-1-1981 Methods of measurement for equipment used in terrestrial radio-relay systems Part 2 Measurements for sub-systems Section One - General《地面无线电中继系统所用设备的测量方法 第2部分 分系统测量 第1节 总则》.pdfIEC 60487-2-1-1981 Methods of measurement for equipment used in terrestrial radio-relay systems Part 2 Measurements for sub-systems Section One - General《地面无线电中继系统所用设备的测量方法 第2部分 分系统测量 第1节 总则》.pdf

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IEC 60483-1976 Guide to dynamic measurements of piezoelectric ceramics with high electromechanical coupling《高机电耦合压电陶瓷的动态测量指南》.pdf 40

IEC 60483-1976 Guide to dynamic measurements of piezoelectric ceramics with high electromechanical coupling《高机电耦合压电陶瓷的动态测量指南》.pdfIEC 60483-1976 Guide to dynamic measurements of piezoelectric ceramics with high electromechanical coupling《高机电耦合压电陶瓷的动态测量指南》.pdf

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IEC 60481-1974 Coupling devices for power line carrier systems《电力线载波系统的耦合装置》.pdf 28

IEC 60481-1974 Coupling devices for power line carrier systems《电力线载波系统的耦合装置》.pdfIEC 60481-1974 Coupling devices for power line carrier systems《电力线载波系统的耦合装置》.pdf

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IEC 60480-2004 Guidelines for the checking and treatment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use《从电气设备中取出六氟化硫(SF6)的检验和处理指南及其再使用规范》.pdf 76

IEC 60480-2004 Guidelines for the checking and treatment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use《从电气设备中取出六氟化硫(SF6)的检验和处理指南及其再使用规范》.pdfIEC 60480-2004 Guidelines for the checking and treatment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use《从电气设备中取出六氟化硫(SF6)的检验和处理指南及其再使用规范》.pdf

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IEC 60255-24-2013 Measuring relays and protection equipment - Part 24 Common format for transient data exchange (COMTRADE) for power systems《测量继电器和保护设备.第24部分 电力系统瞬态数据交换的通用格式(COMTRADE) 》.pdf 148

IEC 60255-24-2013 Measuring relays and protection equipment - Part 24 Common format for transient data exchange (COMTRADE) for power systems《测量继电器和保护设备.第24部分 电力系统瞬态数据交换的通用格式(COMTRADE) 》.pdfIEC 60255-24-2013 Measuring relays and protection equipment - Part 24 Common format for transient data exchange (COMTRADE) for power systems《测量继电器和保护设备.第24部分 电力系统瞬态数据交换的通用格式(COMTRADE) 》.pdf

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IEC 60255-21-3-1993 Electrical relays part 21 vibration shock bump and seismic tests on measuring relays and protection equipment section 3 seismic tests《电气继电器 第21部分 量度继电器和保护装置的振动、冲击、碰撞和地震试验 第3节.pdf 34

IEC 60255-21-3-1993 Electrical relays part 21 vibration shock bump and seismic tests on measuring relays and protection equipment section 3 seismic tests《电气继电器 第21部分 量度继电器和保护装置的振动、冲击、碰撞和地震试验 第3节.pdfIEC 60255-21-3-1993 Electrical relays part 21 vibration shock bump and seismic tests on measuring relays and protection equipment section 3 seismic tests《电气继电器 第21部分 量度继电器和保护装置的振动、冲击、碰撞和地震试验 第3节.pdf

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IEC 60255-151-2009 Measuring relays and protection equipment - Part 151 Functional reuirements for over under current protection《测量继电器和保护设备.第151部分 过 欠电流保护的功能要求》.pdf 68

IEC 60255-151-2009 Measuring relays and protection equipment - Part 151 Functional reuirements for over under current protection《测量继电器和保护设备.第151部分 过 欠电流保护的功能要求》.pdfIEC 60255-151-2009 Measuring relays and protection equipment - Part 151 Functional reuirements for over under current protection《测量继电器和保护设备.第151部分 过 欠电流保护的功能要求》.pdf

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IEC 60255-149-2013 Measuring relays and protection equipment - Part 149 Functional requirements for thermal electrical relays《继电器.第149部分 热继电器功能要求》.pdf 98

IEC 60255-149-2013 Measuring relays and protection equipment - Part 149 Functional requirements for thermal electrical relays《继电器.第149部分 热继电器功能要求》.pdfIEC 60255-149-2013 Measuring relays and protection equipment - Part 149 Functional requirements for thermal electrical relays《继电器.第149部分 热继电器功能要求》.pdf

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IEC 60255-13-1980 Electrical relays Part 13 Biased (percentage) differential relays《电气继电器 第13部分 偏置(比率)差动继电器》.pdf 28

IEC 60255-13-1980 Electrical relays Part 13 Biased (percentage) differential relays《电气继电器 第13部分 偏置(比率)差动继电器》.pdfIEC 60255-13-1980 Electrical relays Part 13 Biased (percentage) differential relays《电气继电器 第13部分 偏置(比率)差动继电器》.pdf

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IEC 60079-20-1-2010 Explosive atmospheres - Part 20-1 Material characteristics for gas and vapour classification - Test methods and data《易爆环境.第20-1部分 气体和蒸汽分类用材料特性.试验方法和试验数据》.pdf 156

IEC 60079-20-1-2010 Explosive atmospheres - Part 20-1 Material characteristics for gas and vapour classification - Test methods and data《易爆环境.第20-1部分 气体和蒸汽分类用材料特性.试验方法和试验数据》.pdfIEC 60079-20-1-2010 Explosive atmospheres - Part 20-1 Material characteristics for gas and vapour classification - Test methods and data《易爆环境.第20-1部分 气体和蒸汽分类用材料特性.试验方法和试验数据》.pdf

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