JUS N M2 160-1990 Safety requirements Electrical massage appliaoces Particular tecbnical corodi- tions and tests《安全要求 电动按摩器具 特殊技术条件及测试》.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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