When the power again, pulling the cable, cable drives the swing block, the other end of the swing block reset mechanism drives the swing block down on the rack;
当再次有电时，拉动拉索，拉索带动摆块，摆块另一端的复位机构带动摆块下移；
When the power again, pulling the cable, cable drives the swing block, the other end of the swing block reset mechanism drives the swing block down on the rack;
当再次有电时，拉动拉索，拉索带动摆块，摆块另一端的复位机构带动摆块下移；
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