SIS SS 431 12 70-1987 Safety ofluminaires - Particular requirements for luminaires for indicator lights 《安全灯具 灯具指示灯的特别要求》.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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