你可以滑动圆柱体边上的滑钮设定初始值，然后转动手柄来计算结果。
You set your initial figures by sliding knobs along the side of the cylinder, then turn the crank to compute the results.
装配完成后，用手转动泵轴，没有擦碰现象，转动比较轻滑均匀即可，拆卸可按上述装配顺序相反的进行。
After assembly, move the pump shaft with hand, it should be smooth and uniform without touch. Disassembly can be made with the steps contrary to above ones.
它由一个滑架、个转动齿轮减速器和一个提升齿轮减速器组成。
It consists of a carriage, a rotary gear reducer and a hoist gear reducer.
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