C0041400_488 Symbols of Telephone《有线电话符号》.pdf

相关资源

JTJ T 343-1996 港口地区有线电话通信系统工程设计规范.pdf

JTJ T 343-1996（条文说明） 港口地区有线电话通信系统工程设计规范.pdf

CNS 13452-2000 Cordless telephone (frequency below 80 MHz)《有线电话无线主副机(80MHz以下)》.pdf

CNS 414-1982 Symbols of Telephone《有线电话符号》.pdf

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