9041| 6
|
[国家标准] GB 15558.1-2003 燃气用埋地聚乙烯(PE)管道系统 第1部分:管材 |
评分
| ||||||||
| |
|关于我们|网站地图|油气储运网
( 鲁ICP备11007657号-3 )
GMT+8, 2025-3-29 16:34 , Processed in 0.031365 second(s), 20 queries , Gzip On, MemCached On.
Powered by Discuz! X3.5
Copyright © 2001-2023, Tencent Cloud.