既然产品的设计上下两层轨道呈现十字交叉的状态，系统的X向的滑动（第一层

Since the design of the product shows that the upper and lower two-layer rails are crossed, the system's X-direction sliding (first-layer rail) and Y-directional sliding (second-layer sliding) are satisfied by this state. The pulley adopts four-wheel sliding and has two guide wheels, which runs smoothly and has low noise. <br>It is installed in the track and slides parallel to the first track.

Since the product is designed to have a cross state of cross-sections, the X-directional sliding of the system (the first-layer track) and the Y-directional slide (the second slide) are satisfied by this state. The carriage uses four-wheel sliding and has two guide wheels, running smoothly and with low noise.<br>It is installed in the orbit and slides parallel to the first-layer orbit. ...

Since the upper and lower tracks of the product design present a cross state, the x-direction sliding (the first level track) and the y-direction sliding (the second level sliding) of the system are all satisfied by this state. The pulley adopts four-wheel sliding and has two guide wheels, which can run stably and make little noise.<br>It is installed in the track and slides parallel to the first level track.<br>