IEC 60235-2A-1974 Measurement of the electrical properties of microwave tubes Part 2 General measurements First supplement Chapter V Methods of measuring paras.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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