differential pistonpump 差动活塞泵

free pistonpump 自由活塞泵

diaphragm pistonpump 隔膜活塞泵

in-line pistonpump 单列式柱塞泵

end-packed type pistonpump 端部密封式活塞泵

inside-packed type pistonpump 内封闭式活塞泵

centre-packed type pistonpump 中央密封式活塞泵

Axial-pistonpump 轴向活塞泵

cam plate type axial pistonpump 斜盘式轴向活塞泵