1498| 15
|
[山地] 问个中轴和脚踏的问题 |
| ||
| ||
| ||
| ||
点评
静摩擦力是咋回事?求受力分析图。我想来想去受力是向着松的方向的。
| ||
点评
求受力分析图,无论如何分析不出紧的受力啊
| ||
| ||
| ||
| ||
| ||
GMT+8, 2024-12-27 17:09 , Processed in 0.030348 second(s), 31 queries .
Powered by Discuz! X3
© 2001-2013 Comsenz Inc.