simplex double acting pump 单缸式复动泵

duplex double acting pump 双缸复动泵 ; 复式双动水泵 ; 双缸双作用泵

double acting piston pump 双作用活塞泵 ; 双效用活塞泵 ; 双作用式活塞泵 ; 双程活塞泵

simplex x double acting pump 单缸式复动泵

double-acting pump with composite vanes 双作用子母叶片泵

double-acting vane pump 双作用叶片泵

double-acting hand force pump 双作用手摇泵

double-acting duplex slush pump 双动双工泥浆泵