TCVN 5699-2-50-2007 Household and similar electrical appliances Safety Part 2-50 Particular requirements for commercial electric bains-marie《家用和类似用途电器 安全 第2-50部分 商用双层电蒸锅的详细要求》.pdf

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ITU-R RAPPORT M 766-2 FRENCH-1990 Feasibility of frequency sharing between the GPS and other services《全球定位系统和其他服务之间的频率共享的可行性》.pdf

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