SANS 4519-1980 Electrodeposited metallic coatings and related finishes - Sampling procedures for inspection by attributes《电镀金属层和有关的精加工 计数检查的取样程序》.pdf

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IRS 70778-2-2018 Recommendations for determining the carrying capacity and fatigue risks of existing metallic railway bridges.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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