![]() |
為什么鉸孔時(shí)孔壁是黑色,,鏜孔時(shí)孔壁是白色? |
點(diǎn)評
查過了 切削液 的成分了嗎,? 或是主觀的認(rèn)定,?
| ||
小黑屋|手機(jī)版|Archiver|機(jī)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, 2025-2-11 19:04 , Processed in 0.057585 second(s), 13 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.