5657| 7
|
哪位前輩指導一下,45號鋼的安全系數(shù)怎樣計算,?有什么公式,? |
| ||
| ||
| ||
| ||
| ||
點評
因為再無其他限定條件了,。
| ||
小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,,京ICP證050210號,浙公網(wǎng)安備33038202004372號 )
GMT+8, 2025-2-15 15:50 , Processed in 0.072300 second(s), 14 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.