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电信明线新8式交叉制式
The "Xin-8" Transposltion system for open-wire telecommunication lines
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电信明线新4式交叉制式
The "Xin-4" transposltion system for open-wire telecommunication lines
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明线晶体管载波电话机雷击模拟试验
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不使用包封的同步数据复用方案基本参数
Fundamental parameters of synchronous data multiplexing scheme without envelope structure
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长途通信干线数字复用设备安装工程设计规范
Specification for installation engineering design of digital multiplex equipment of long distance communication trunk
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长途通信干线电缆线路工程设计规范
Engineering design specifications for long distance communication trunk cables and lines
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市内通信全塑电缆线路工程施工及验收技术规范
Technical specifications for engineering construction and acceptance of all-plastic cable and lines for urban local communication
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