When the eccentric disc rotates in the positive direction, the support rod is driven to rotate upwards so as to lift weight.
偏心盘作反方向偏心旋转时支撑杆随偏心盘作向下方向旋转，使举重器下降复位。
Plunger pistons which are arranged in the horizontal direction are pushed by eccentric wheels on the output shafts of motors which are arranged in the vertical direction to work.
本实用新型由立式安装的电动机的输出轴上的偏心轮推动水平安置的柱塞工作。
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