采用静力缩减方法，由平面梁单元弯曲平衡方程推导出两端带扭簧的杆件宏单元缩减刚度矩阵。
And the reduced linear elastic stiffness matrix is formulated for the macro-element of planar beam attached with springs at both ends through static reduced technique.
新型环锭纺机利用弹性元件和干衡凸轮来替代传统用的重锤，以平衡升降部件的大部分自重，其中有用扭杆的，也有用螺旋圈簧的。
In new type ring frames, elastic members and balancing cams are used to replace the traditional dead weights for the balancing of the ring rails and other lifting parts.
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