5709| 13
|
這壓板下面是彈簧么,什么用? |
| ||
點評
彈簧的剛度能抵制變形,?那有當(dāng)老師的天天向?qū)W生學(xué)習(xí)的?不要誤人子弟了,。
| ||
| |
| ||
| ||
| ||
| ||
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, 2025-4-5 17:20 , Processed in 0.064255 second(s), 18 queries , Gzip On.
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.