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IEC 61094-8-2012 Measurement microphones - Part 8 Methods for determining the free-field sensitivity of working standard microphones by comparison《测量传声器.第8部分 利用比较法测定工作标准麦克风自由声场灵敏度》.pdf 66

IEC 61094-8-2012 Measurement microphones - Part 8 Methods for determining the free-field sensitivity of working standard microphones by comparison《测量传声器.第8部分 利用比较法测定工作标准麦克风自由声场灵敏度》.pdfIEC 61094-8-2012 Measurement microphones - Part 8 Methods for determining the free-field sensitivity of working standard microphones by comparison《测量传声器.第8部分 利用比较法测定工作标准麦克风自由声场灵敏度》.pdf

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IEC 61094-6-2004 Measurement microphones - Part 6 Electrostatic actuators for determination of frequency response《测量传声器.第6部分 频率响应的测定用静电致动器》.pdf 62

IEC 61094-6-2004 Measurement microphones - Part 6 Electrostatic actuators for determination of frequency response《测量传声器.第6部分 频率响应的测定用静电致动器》.pdfIEC 61094-6-2004 Measurement microphones - Part 6 Electrostatic actuators for determination of frequency response《测量传声器.第6部分 频率响应的测定用静电致动器》.pdf

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IEC 61094-4-1995 Measurement microphones - Part 4 Specifications for working standard microphones《测量传声器 第4部分 传声器工作标准规范》.pdf 28

IEC 61094-4-1995 Measurement microphones - Part 4 Specifications for working standard microphones《测量传声器 第4部分 传声器工作标准规范》.pdfIEC 61094-4-1995 Measurement microphones - Part 4 Specifications for working standard microphones《测量传声器 第4部分 传声器工作标准规范》.pdf

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IEC 61089-1991 Round wire concentric lay overhead electrical stranded conductors《圆线同心绞架空导线》.pdf 68

IEC 61089-1991 Round wire concentric lay overhead electrical stranded conductors《圆线同心绞架空导线》.pdfIEC 61089-1991 Round wire concentric lay overhead electrical stranded conductors《圆线同心绞架空导线》.pdf

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IEC 61089 AMD 1-1997 Round wire concentric lay overhead electrical stranded conductors Amendment 1《圆线同心绞架空导线 修改1》.pdf 18

IEC 61089 AMD 1-1997 Round wire concentric lay overhead electrical stranded conductors Amendment 1《圆线同心绞架空导线 修改1》.pdfIEC 61089 AMD 1-1997 Round wire concentric lay overhead electrical stranded conductors Amendment 1《圆线同心绞架空导线 修改1》.pdf

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IEC 60839-7-12-2001 Alarm systems - Part 7-12 Message formats and protocols for serial data interfaces in alarm transmission systems PTT interfaces for dedicated communications cha.pdf 22

IEC 60839-7-12-2001 Alarm systems - Part 7-12 Message formats and protocols for serial data interfaces in alarm transmission systems PTT interfaces for dedicated communications cha.pdfIEC 60839-7-12-2001 Alarm systems - Part 7-12 Message formats and protocols for serial data interfaces in alarm transmission systems PTT interfaces for dedicated communications cha.pdf

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IEC 60839-7-11-2001 Alarm systems - Part 7-11 Message formats and protocols for serial data interfaces in alarm transmission systems Serial protocol for use by digital communicator.pdf 22

IEC 60839-7-11-2001 Alarm systems - Part 7-11 Message formats and protocols for serial data interfaces in alarm transmission systems Serial protocol for use by digital communicator.pdfIEC 60839-7-11-2001 Alarm systems - Part 7-11 Message formats and protocols for serial data interfaces in alarm transmission systems Serial protocol for use by digital communicator.pdf

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IEC 60839-7-1-2001 Alarm systems - Part 7-1 Message formats and protocols for serial data interfaces in alarm transmission systems General《报警系统 第7-1部分：报警传输系统中串行数据接口用报文格式和协议 总则》.pdf 48

IEC 60839-7-1-2001 Alarm systems - Part 7-1 Message formats and protocols for serial data interfaces in alarm transmission systems General《报警系统 第7-1部分：报警传输系统中串行数据接口用报文格式和协议 总则》.pdfIEC 60839-7-1-2001 Alarm systems - Part 7-1 Message formats and protocols for serial data interfaces in alarm transmission systems General《报警系统 第7-1部分：报警传输系统中串行数据接口用报文格式和协议 总则》.pdf

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IEC 60839-5-3-2016 Alarm and electronic security systems - Part 5-3 Alarm transmission systems - Requirements for receiving centre transceiver (RCT)《警报和电子安全系统 第5-3部分 警报传输系统 接收中心收发器 (RCT) 要求》.pdf 56

IEC 60839-5-3-2016 Alarm and electronic security systems - Part 5-3 Alarm transmission systems - Requirements for receiving centre transceiver (RCT)《警报和电子安全系统 第5-3部分 警报传输系统 接收中心收发器 (RCT) 要求》.pdfIEC 60839-5-3-2016 Alarm and electronic security systems - Part 5-3 Alarm transmission systems - Requirements for receiving centre transceiver (RCT)《警报和电子安全系统 第5-3部分 警报传输系统 接收中心收发器 (RCT) 要求》.pdf

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IEC 60839-5-1-2014 Alarm electronic security systems - Part 5-1 Alarm transmission systems - General requirements《电子警报安保系统 第5-1部分 警报传输系统 一般要求》.pdf 76

IEC 60839-5-1-2014 Alarm electronic security systems - Part 5-1 Alarm transmission systems - General requirements《电子警报安保系统 第5-1部分 警报传输系统 一般要求》.pdfIEC 60839-5-1-2014 Alarm electronic security systems - Part 5-1 Alarm transmission systems - General requirements《电子警报安保系统 第5-1部分 警报传输系统 一般要求》.pdf

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