本文从理论上推导出齿轮泵长圆形卸荷槽的设计计算公式。

This paper derives theoretically calculation formula of designing circle-form-at-ends rectangle unloading groove.

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机器的传动装置极富创意，由指针和刻度盘组成的装置连接两个齿轮，其引起的刻度变化代表月球的运行，这符合希帕科斯提出的月球在椭圆形轨道上绕地球运转的模式。

An ingenious pin-and-slot device connecting two gear-wheels induced variations in the representation of lunar motions according to the Hipparchos model of the Moon's elliptical orbit around Earth.

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