被锁“材料力学 I 20 主应力&主平面(续)”链接
知乎:
https://www.zhihu.com/zvideo/1618600014841827328
西瓜视频:
https://www.ixigua.com/7209177104091447812?logTag=05d769156415c1fa322d
抖音:
https://www.douyin.com/user/self?modal_id=7209176929591774503&showTab=post
知乎:
https://www.zhihu.com/zvideo/1618600014841827328
西瓜视频:
https://www.ixigua.com/7209177104091447812?logTag=05d769156415c1fa322d
抖音:
https://www.douyin.com/user/self?modal_id=7209176929591774503&showTab=post