|
1127| 3
|
[技术规范] GB／T 51281-2018 同步数字体系（sdh）光纤传输系统工程验收标准 |
|
| |
|
||
发表于 2025-3-6 23:44:42
版规|手机版|C114 ( 沪ICP备12002291号-1 )|联系大家 |网站地图
GMT+8, 2025-4-1 03:28 , Processed in 0.102929 second(s), 19 queries , Gzip On.
Copyright © 1999-2023 C114 All Rights Reserved
Discuz Licensed