Modified liftingmotion is provided with higher reliability and precision of allocation and alignment, stable motion, compact structure, and convenient maintenance.
改进后的升降装置具有更高的可靠性，运动平稳，定位及对中精度高，结构紧凑，维护保养方便。
2
Modern car engines that use rolling or sliding tappets for transmitting the rapid up-down liftingmotion of the spinning camshafts—to open and close the engine’s inlet and exhaust valves—seem immune.
Modern car engines that use rolling or sliding tappets for transmitting the rapid up-down liftingmotion of the spinning camshafts-to open and close the engine's inlet and exhaust valves-seem immune.