当刻度指示器指向规定的位置，放开脚踏板。
Release the Foot Switch when the Calibration Indicator reaches its set position.
最初，它的顶部有旋转的刻度盘和其他指示物，上面的字母和图画描绘了太阳、月相和不同的星座。
In its original state, there were rotating dials and other indicators on the top, with letters and drawings showing the Sun, the phases of the moon and different constellations.
这个装置的正面有个刻度盘，盘上至少有三根指针，一根用来指示日期，其余两根用来表示太阳和月亮的位置。
A dial on the front of the device probably carried at least three hands, one indicating the date and the other two indicating the positions of the Sun and the Moon.
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