NEN 5661-1984 Rubber and plastics hoses and hose assemblies - Ratio of testing and bursting pressures to design pressures《橡胶和塑料软管和软管组件 试验和爆裂压力与设计压力的比值》.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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