Then, the principle of virtual work is used to derivate the equilibrium condition of CM. 在以上基础上,应用虚功原理,推导出柔性机械稳态的条件。
On the principle of the deformation work this paper words out a very simple method for approximate calculation of the extrusion force in the metalic plastic extrusion processes. 运用变形功原理,推导出求金属塑性挤压过程中挤压力的一种极其简捷的近似计算式。