shear force diagram [力] 剪力图
normal force diagram 法向力图表 ; 法向力图 ; 以法向力为纵坐标
cremona force diagram 克雷莫纳力图
derrick force diagram 吊杆受力图
tractive force diagram 牵引力平衡图
Especially it is easy to make errors in drawing internal force diagram of a beam because the rules are too more to memory.
尤其是梁弯曲时内力图绘制的规律较多，不易记忆，容易出错。
To learn engineering mechanics and do engineering computation, we must master the drawing methods of internal force diagram.
要学好工程力学，进行工程计算，必须掌握好内力作图方法。
The particle route method is produced for the shear force diagram drawing of multi-span beam based on the geometric principle of the force addition.
基于力的合成的几何法原理，提出了绘制多跨梁剪力图的质点路线法。
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