direct acting pump 直接作用泵 ; 直接联动泵 ; 直动泵

direct acting steam pump 蒸汽直动活塞泵 ; 直动蒸汽泵 ; 直联蒸汽泵

direct acting steam pump coupling 蒸汽直动活塞泵联轴器

direct-acting reciprocating pump 直接联动往复泵

Pump direct-acting 直接出力泵

direct t acting pump 直接联动泵

direct-acting steam pump 蒸汽直接作用泵

direct-acting bellows pump 直动波纹泵

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