SIS SS-IEC 1018-1992 Nuclear instrumentation - High range beta andphoton dose and dose r te portable instruments for emergency radiation protection purposes《核检测仪表 应急辐射防护用便携式高量程β和光子.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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