一个固定在主轴上，另一个与主轴转动配合。
One is fastened to the master shaft, the other fits with the master drive shaft.
其特征是一个与主轴转动配合的齿轮套与两套活塞组的连杆齿条相啮合。
It features in the engaging of the gear sleeve that matches with the rotary of the master shaft and the connecting rod rack of two sets pistons.
其特征是一个与主轴转动配合的齿轮套与两套活塞组的连杆齿条相啮合。
It features in the engaging of the gear sleeve that matches with the rotary of the master shaft and the connecting rod rack of two sets pistons.
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