NF C97-151 A1-1992 Helical-scan video tape cassette system using 12 65 mm (0 5 in) magnetic tape on type VHS-Compact VHS video cassette 《使用 VHS 型1 2 65 mm (0 5in) 磁带的螺旋扫描盒式录像带系统 压缩.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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