SIS SS-ISO 2373-1982 Vibration and shock - Measurement and evaluation of vibration severity of electrical machines《震动和冲击 电机振动强烈度的测量和评估》.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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