This method is to compare the general motionof a rigid body with the force systems in space and the central axis equation of the force systems in space has been derived beforehand.
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。
2
The screw axis equationof the general motion of a rigid body has been derived by means of a comparison method.
本文用比拟法推得了刚体一般运动的螺旋轴方程。
3
A method based on the transverse particle motionequation is described for the calculation of beam acceptance for RFQ accelerators.