短語詞組短語piston -type pump 活塞式泵;活塞泵rotary piston lifeel type pump 羅茨泵rotary piston libe type pump 羅茨泵;凸輪泵;羅茨泵凸輪泵;凸輪rotary piston lobe type pump 羅茨泵;凸輪泵piston type fuel pump 活塞式燃料泵;活塞式燃油泵piston type oil pump 柱塞式油泵axial piston type pump 軸曏活塞式泵piston type transfer pump 活塞式輸送泵balancing piston type pump 平衡鼓式泵 返回 piston type pump