YD/T 5090-2005.Acceptance Specification of Equipment Installation for Digital Synchronization Networ...
YD通讯标准
YD通讯标准
YD通讯标准
YD/T 5090-2000 数字同步网同步设备安装工程验收规范
YD/T 5090-2000.Acceptance Standards of Synchronization Equipment Installation Project for Digital Sy...