汇交力系是各力的作用线都汇交于一点的力系，又称共点力系，各分力的合成效果是一个合力。
借助于三维CAD工程绘图技术，本文介绍了采用图解法求解空间汇交力系平衡问题的应用实例。
With the help of 3D CAD, this paper presents an actual example of solving the problem of equilibrium of a spatial concurrent force system by the graphic solution.
平面汇交力系的解析法是用平面汇交力系的平衡方程计算未知力，其平衡方程最简单，但也最容易出错。
The analytical method of system of plane intercrossing forces is to calculate unknown forces by use of equilibrium equation of plane system of plane intercrossing forces.
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