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IEC 61290-1-2-2005 Optical amplifiers - Test methods - Part 1-2 Power and gain parameters - Electrical spectrum analyzer method《光学放大器.试验方法.第1-2部分 光功率参数和增益参数.电频谱分析仪法》.pdf 44

IEC 61290-1-2-2005 Optical amplifiers - Test methods - Part 1-2 Power and gain parameters - Electrical spectrum analyzer method《光学放大器.试验方法.第1-2部分 光功率参数和增益参数.电频谱分析仪法》.pdfIEC 61290-1-2-2005 Optical amplifiers - Test methods - Part 1-2 Power and gain parameters - Electrical spectrum analyzer method《光学放大器.试验方法.第1-2部分 光功率参数和增益参数.电频谱分析仪法》.pdf

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IEC 61290-1-1-2015 Optical amplifiers - Test methods - Part 1-1 Power and gain parameters - Optical spectrum analyzer method《光学放大器.试验方法.第1-1部分 功率和增益参数.光频谱分析仪法》.pdf 16

IEC 61290-1-1-2015 Optical amplifiers - Test methods - Part 1-1 Power and gain parameters - Optical spectrum analyzer method《光学放大器.试验方法.第1-1部分 功率和增益参数.光频谱分析仪法》.pdfIEC 61290-1-1-2015 Optical amplifiers - Test methods - Part 1-1 Power and gain parameters - Optical spectrum analyzer method《光学放大器.试验方法.第1-1部分 功率和增益参数.光频谱分析仪法》.pdf

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IEC 61287-1-2014 Railway applications - Power converters installed on board rolling stock - Part 1 Characteristics and test methods《轨道交通.安装在铁路机车上的电力变流器.第1部分 特性和试验方法》.pdf 124

IEC 61287-1-2014 Railway applications - Power converters installed on board rolling stock - Part 1 Characteristics and test methods《轨道交通.安装在铁路机车上的电力变流器.第1部分 特性和试验方法》.pdfIEC 61287-1-2014 Railway applications - Power converters installed on board rolling stock - Part 1 Characteristics and test methods《轨道交通.安装在铁路机车上的电力变流器.第1部分 特性和试验方法》.pdf

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IEC 61285-2015 Industrial-process control - Safety of analyser houses《工业过程控制.分析器罩的安全》.pdf 60

IEC 61285-2015 Industrial-process control - Safety of analyser houses《工业过程控制.分析器罩的安全》.pdfIEC 61285-2015 Industrial-process control - Safety of analyser houses《工业过程控制.分析器罩的安全》.pdf

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IEC 61158-3-1-2014 Industrial communication networks - Fieldbus specifications - Part 3-1 Data-link layer service definition - Type 1 elements《工业通讯网络.数据总线规范.第3-1部分 数据联络层设备定义.1型元件》.pdf 276

IEC 61158-3-1-2014 Industrial communication networks - Fieldbus specifications - Part 3-1 Data-link layer service definition - Type 1 elements《工业通讯网络.数据总线规范.第3-1部分 数据联络层设备定义.1型元件》.pdfIEC 61158-3-1-2014 Industrial communication networks - Fieldbus specifications - Part 3-1 Data-link layer service definition - Type 1 elements《工业通讯网络.数据总线规范.第3-1部分 数据联络层设备定义.1型元件》.pdf

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IEC 61158-2-2014 Industrial communication networks - Fieldbus specifications - Part 2 Physical layer specification and service definition《工业通讯网络.数据总线规范.第2部分 物理层规范和服务定义》.pdf 1012

IEC 61158-2-2014 Industrial communication networks - Fieldbus specifications - Part 2 Physical layer specification and service definition《工业通讯网络.数据总线规范.第2部分 物理层规范和服务定义》.pdfIEC 61158-2-2014 Industrial communication networks - Fieldbus specifications - Part 2 Physical layer specification and service definition《工业通讯网络.数据总线规范.第2部分 物理层规范和服务定义》.pdf

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IEC 61157-2007 Standard means for the reporting of the acoustic output of medical diagnostic ultrasonic equipment《医疗诊断超声波设备声输出的报告用标准方法》.pdf 36

IEC 61157-2007 Standard means for the reporting of the acoustic output of medical diagnostic ultrasonic equipment《医疗诊断超声波设备声输出的报告用标准方法》.pdfIEC 61157-2007 Standard means for the reporting of the acoustic output of medical diagnostic ultrasonic equipment《医疗诊断超声波设备声输出的报告用标准方法》.pdf

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IEC 61157 Edition 2.1-2013 Standard means for the reporting of the acoustic output of medical diagnostic ultrasonic equipment《医用超声诊断设备的声学输出报告用标准平均值》.pdf 72

IEC 61157 Edition 2.1-2013 Standard means for the reporting of the acoustic output of medical diagnostic ultrasonic equipment《医用超声诊断设备的声学输出报告用标准平均值》.pdfIEC 61157 Edition 2.1-2013 Standard means for the reporting of the acoustic output of medical diagnostic ultrasonic equipment《医用超声诊断设备的声学输出报告用标准平均值》.pdf

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IEC 61156-8-2009 Multicore and symmetrical pair quad cables for digital communications - Part 8 Symmetrical pair quad cables with transmission characteristics up to 1200 MHz - Work.pdf 22

IEC 61156-8-2009 Multicore and symmetrical pair quad cables for digital communications - Part 8 Symmetrical pair quad cables with transmission characteristics up to 1200 MHz - Work.pdfIEC 61156-8-2009 Multicore and symmetrical pair quad cables for digital communications - Part 8 Symmetrical pair quad cables with transmission characteristics up to 1200 MHz - Work.pdf

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IEC 60909-0-2016 Short-circuit currents in three-phase a.c systems - Part 0 Calculation of currents《三相交流系统的短路电流.第0部分 电流计算》.pdf 154

IEC 60909-0-2016 Short-circuit currents in three-phase a.c systems - Part 0 Calculation of currents《三相交流系统的短路电流.第0部分 电流计算》.pdfIEC 60909-0-2016 Short-circuit currents in three-phase a.c systems - Part 0 Calculation of currents《三相交流系统的短路电流.第0部分 电流计算》.pdf

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