reciprocating main motion 往复主运动 reciprocating feed motion 往复式进给运动 reciprocating-motion vertical conveyer 往复式垂直输送机 .
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砂轮作旋转主运动，工作台作纵向往复运动，砂轮架作间歇的竖直切入运动和横向进给运动。
Grinding wheel for the rotating main movement, workbench as a vertical reciprocating motion, grinding wheel rack for intermittent movement into the vertical and horizontal feed movement.
链结子为换向机构，具有滑动轴承功能，并联循环链和主传动链，把循环运动变为上下往复运动。承载链直接承受平衡载荷，可大幅度减小主传动链的受力。
The chain link is the reverse mechanism, functions as sliding bearing and makes the cycle chain and main drive chain parallel to change the circulation into reciprocation.
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