YD/T 5095-2005.Design Specification for SDH Long Haul Optical Fiber Cable Transmission System Projec...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 5095-2000 同步数字系列(SDH)长途光缆传输工程设计规范
YD/T 5095-2000 Specifications of Engineering Design for SDH Long - Haul Optical Fiber Cable Transmis...