1539| 3
|
新旧国标和国外标准表面粗糙度(光洁度)代号及参数对照表,难得参考信息 |
| ||
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, 2024-11-15 14:03 , Processed in 0.052174 second(s), 14 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.