JUS M F1 010-1989 End-suction centrifugal pumps (rating 16 bar) Designation nominal duty point and imensions《端吸离心泵 （额定16bar） 设计、常规负载和尺寸》.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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