Since it is reliable with the higher characteristic of precision because the whole Angle machine is of simple structure, works, often used in the measurement of the Angle of axle.
自整角机由于具有结构简单、工作可靠和精度高等特点，经常用于轴角的测量。
The rotatory angle of the axle centre is larger than the observation angle.
实际轴心旋转角>术者观察角。
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