|
4091| 3
|
[国家标准] GB/T 23257-2009 埋地钢质管道聚乙烯防腐层 |
|
| |
|关于我们|网站地图|油气储运网
( ICP11007657-3 )
GMT+8, 2024-4-25 09:36 , Processed in 0.030518 second(s), 15 queries , Gzip On, MemCached On.
Powered by Discuz! X3.5
Copyright © 2001-2023, Tencent Cloud.
发表于 2014-11-4 22:42:06
