the x-traverse moves along the y-guideways. The x-carriage moves along the x-traverse. The z-axis together probe moves in the z direction. All the moving elements are jointed with air bearings. During the probing process, dynamic inertial forces due to the distributed mass of the x carriage, the z-axis and the x-traverse it-self will make the x-traverse bend around the y-joints, which will cause the displacement error at the probing position. 其中 x-traverse x-carriage z-axis y-joints and the beam-shaped elements这些怎么理解，求中文解释？？如有三坐标英中翻译发下kbf101@126.com