IEC 60773-1983 Test methods and apparatus for the measurement of the operational characteristics of brushes《测定电刷运行特性的试验方法和设备》.pdf

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IEC TS 62492-1-2008 Industrial process control devices - Radiation thermometers - Part 1 Technical data for radiation thermometers《工业过程控制装置 辐射温度计 第1部分 辐射温度计的技术数.pdf

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IEC TR 61241-2-2-1993 Electrical apparatus for use in the presence of combustible dust part 2 test methods section 2 method for determining the electrical resis.pdf

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