8353| 3
|
[国家标准] GB 20801-2-2020 压力管道规范 工业管道第 第2部分 材料 |
| ||
|关于我们|网站地图|油气储运网 ( 鲁ICP备11007657号-3 )
GMT+8, 2024-11-24 13:23 , Processed in 0.022392 second(s), 13 queries , Gzip On, MemCached On.
Powered by Discuz! X3.5
Copyright © 2001-2023, Tencent Cloud.