短语词组短语bending moment axis 中和轴位置bending radius of axis 轴线曲率半径The bending of bend axis 曲轴弯曲Axis bending 弯轴;轴是否弯曲axis of bending 弯曲轴线cross -axis roll bending 辊筒轴交叉反弯曲装置 返回 bending axis