390| 0
|
[HG-化工标准] HGT 20635-2009 钢制管法兰、垫片、紧固件选用配合规定(Class系列) |
| ||
相关帖子 |
||
帮助文档|清除痕迹|广告位|Archiver|手机版|小黑屋|空分之家 ( 鲁ICP备10016836 )
GMT+8, 2024-11-21 20:48 , Processed in 0.193302 second(s), 33 queries .
Powered by Discuz! X3.4
© 2001-2023 Discuz! Team.