被鎖“材料力學(xué) I 20 主應(yīng)力&主平面(續(xù))”鏈接
知乎:
https://www.zhihu.com/zvideo/1618600014841827328
西瓜視頻:
https://www.ixigua.com/7209177104091447812?logTag=05d769156415c1fa322d
抖音:
https://www.douyin.com/user/self?modal_id=7209176929591774503&showTab=post
標(biāo)簽: