任一刚体的空间运动都可以视为沿某一轴线作螺旋运动。
Spatial motion of a rigid body can be seen as a screw motion of the body along a specific axis.
这个方法就是将刚体一般运动与空间一般力系进行类比，而一般力系的中心轴方程是巳知的。
This method is to compare the general motion of a rigid body with the force systems in space and the central axis equation of the force systems in space has been derived beforehand.
通过分析研究，按平面、空间刚体极限平衡法对岩墙进行稳定计算；
Plan and space rigid limiting equilibrium method is applied to calculate the stability of anchored rock wall.
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