21568| 9
|
在什么情况下,螺丝、螺钉、螺母等可以不用垫片(平垫弹簧垫都算上)? |
| ||
| ||
| ||
| ||
小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
GMT+8, 2024-11-12 12:46 , Processed in 0.050651 second(s), 14 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.