duplex acting steam-driven reciprocating pump 双作用蒸汽往复泵

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

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

double-acting duplex pump 双缸双作用泵

duplex single-acting 双缸单作用

acting duplex slush pump 双动双工泥浆泵

duplex direct acting steam pump 双缸直接推动式蒸气泵