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IEC 60345-1971 Method of test for electrical resistance and resistivity of insulating materials at elevated temperatures《绝缘材料在高温下电阻和电阻率的试验方法》.pdf 12

IEC 60345-1971 Method of test for electrical resistance and resistivity of insulating materials at elevated temperatures《绝缘材料在高温下电阻和电阻率的试验方法》.pdfIEC 60345-1971 Method of test for electrical resistance and resistivity of insulating materials at elevated temperatures《绝缘材料在高温下电阻和电阻率的试验方法》.pdf

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IEC 60152-1963 Identification by hour numbers of the phase conductors of 3-phase electric systems《用小时数标识三相电力系统的相导线》.pdf 14

IEC 60152-1963 Identification by hour numbers of the phase conductors of 3-phase electric systems《用小时数标识三相电力系统的相导线》.pdfIEC 60152-1963 Identification by hour numbers of the phase conductors of 3-phase electric systems《用小时数标识三相电力系统的相导线》.pdf

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IEC 60151-9-1966 Measurements of the electrical properties of electronic tubes Part 9 Methods of measuring the cathode-interface impedance《电子管电性能的测量 第9部分 阴极中间层阻抗的测量方法》.pdf 44

IEC 60151-9-1966 Measurements of the electrical properties of electronic tubes Part 9 Methods of measuring the cathode-interface impedance《电子管电性能的测量 第9部分 阴极中间层阻抗的测量方法》.pdfIEC 60151-9-1966 Measurements of the electrical properties of electronic tubes Part 9 Methods of measuring the cathode-interface impedance《电子管电性能的测量 第9部分 阴极中间层阻抗的测量方法》.pdf

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IEC 60151-8-1966 Measurements of the electrical properties of electronic tubes Part 8 Measurement of cathode heating time and heater warm-up time《电子管电性能的测量 第8部分 阴极加热时间和热丝加热时间的测量》.pdf 17

IEC 60151-8-1966 Measurements of the electrical properties of electronic tubes Part 8 Measurement of cathode heating time and heater warm-up time《电子管电性能的测量 第8部分 阴极加热时间和热丝加热时间的测量》.pdfIEC 60151-8-1966 Measurements of the electrical properties of electronic tubes Part 8 Measurement of cathode heating time and heater warm-up time《电子管电性能的测量 第8部分 阴极加热时间和热丝加热时间的测量》.pdf

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IEC 60151-7-1964 Measurements of the electrical properties of electronic tubes Part 7 Measurement of equivalent noise resistance《电子管电性能的测量 第7部分 等效噪声电阻的测量》.pdf 18

IEC 60151-7-1964 Measurements of the electrical properties of electronic tubes Part 7 Measurement of equivalent noise resistance《电子管电性能的测量 第7部分 等效噪声电阻的测量》.pdfIEC 60151-7-1964 Measurements of the electrical properties of electronic tubes Part 7 Measurement of equivalent noise resistance《电子管电性能的测量 第7部分 等效噪声电阻的测量》.pdf

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IEC 60151-5-1964 Measurements of the electrical properties of electronic tubes Part 5 Methods of measuring hiss and hum《电子管电性能的测量 第5部分 嘘声和哼声的测量方法》.pdf 18

IEC 60151-5-1964 Measurements of the electrical properties of electronic tubes Part 5 Methods of measuring hiss and hum《电子管电性能的测量 第5部分 嘘声和哼声的测量方法》.pdfIEC 60151-5-1964 Measurements of the electrical properties of electronic tubes Part 5 Methods of measuring hiss and hum《电子管电性能的测量 第5部分 嘘声和哼声的测量方法》.pdf

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IEC 60050-541 AMD 1-2015 International Electrotechnical Vocabulary - Part 541 Printed circuits《国际电工词汇 第541章 印制电路 修改件1》.pdf 8

IEC 60050-541 AMD 1-2015 International Electrotechnical Vocabulary - Part 541 Printed circuits《国际电工词汇 第541章 印制电路 修改件1》.pdfIEC 60050-541 AMD 1-2015 International Electrotechnical Vocabulary - Part 541 Printed circuits《国际电工词汇 第541章 印制电路 修改件1》.pdf

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IEC 60050-531-1974 International Electrotechnical Vocabulary Part 531 Electronic tubes《国际电工词汇 第531部分 电子管》.pdf 172

IEC 60050-531-1974 International Electrotechnical Vocabulary Part 531 Electronic tubes《国际电工词汇 第531部分 电子管》.pdfIEC 60050-531-1974 International Electrotechnical Vocabulary Part 531 Electronic tubes《国际电工词汇 第531部分 电子管》.pdf

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IEC 60050-521-2002 International Electrotechnical Vocabulary - Part 521 Semiconductor devices and integrated circuits《国际电工词汇.第521部分 半导体器件和集成电路》.pdf 218

IEC 60050-521-2002 International Electrotechnical Vocabulary - Part 521 Semiconductor devices and integrated circuits《国际电工词汇.第521部分 半导体器件和集成电路》.pdfIEC 60050-521-2002 International Electrotechnical Vocabulary - Part 521 Semiconductor devices and integrated circuits《国际电工词汇.第521部分 半导体器件和集成电路》.pdf

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IEC 60050-482-2004 International Electrotechnical Vocabulary - Part 482 Primary and secondary cells and batteries《国际电工词汇.第482部分 原电池和蓄电池及蓄电池组》.pdf 154

IEC 60050-482-2004 International Electrotechnical Vocabulary - Part 482 Primary and secondary cells and batteries《国际电工词汇.第482部分 原电池和蓄电池及蓄电池组》.pdfIEC 60050-482-2004 International Electrotechnical Vocabulary - Part 482 Primary and secondary cells and batteries《国际电工词汇.第482部分 原电池和蓄电池及蓄电池组》.pdf

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