蜗轮与蜗杆被用来驱动方位角的转轴，仰角的转动则使用螺杆。

Worm gears are adopted for driving rotational motion along azimuth Angle and power screws are used for raising zenith Angle.

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蜗杆的几何形状类似于机械螺纹，蜗杆的转动与一个渐开线导轨直线移动是相仿的。

The geometry of a worm is similar to that of a power screw.

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在机械及控制系统设计中，由于磁体需套装在单晶炉上，因此采用了蜗轮蜗杆机械驱动外磁环转动的机械结构。

To design the mechanical and auto-control system, the worm wheel is used to drive the outer annular magnet.

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