逆活塞 meaning in English

counterpiston

For the avoidance of rigidity impact of commutative piston mortar pump in movement , the amendatory cam mechanism was designed , and the characteristic of movements was analyzed
为避免互逆活塞式砂浆泵在运动过程中出现的“刚性冲击” ，对凸轮机构进行了修正设计，并分析了修正凸轮机构的运动特性。
A new type of mortar pump was designed , namely the commutative piston mortar pump , the spirality line of equal velocity was regarded as the contour line of the cam working , and the cam mechanism was analyzed of the movements
提出了一种新型的砂浆泵? ?互逆活塞式砂浆泵，采用等速螺线作为凸轮工作段廓线，并进行了运动分析。