4429| 13
|
[Sonet/SDH] 同步数字系列(SDH)光缆传输设备安装工程验收暂行规定(YD5044-97)[下载] |
手机版|C114 ( 沪ICP备12002291号-1 )|联系大家 |网站地图
GMT+8, 2024-11-17 02:25 , Processed in 0.108905 second(s), 16 queries , Gzip On.
Copyright © 1999-2023 C114 All Rights Reserved
Discuz Licensed