"571400" . . "Recorded" . "'Reciprocating positive displacement pump' is a synonym. 'Reciprocating displacement pump' is a synonym." . "u20683" . "RECIPROCATING PUMP" . "RECIPROCATING PUMP" . "1999.06.30" . "a positive displacement pump which contains a displacing element intended to be moved in a reciprocating movement to exert pressure on a fluid, typically moving within a cylindrical space." . "RECIPROCATING POSITVE DISPLACEMENT PUMP" . "RDS416969" .