6523| 18
|
工作用錯材料,把二個不同的材料混一起了,如何區(qū)分中碳和低碳鋼? |
點評
對,教材就這么說,焊工那篇
| ||
| ||
點評
正解。
| ||
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, 2024-9-22 04:28 , Processed in 0.065624 second(s), 20 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.