| http://www.w3.org/ns/prov#value | - In our U.S. Pat. No. 6,530,761 (Chalk et al.), which is assigned to the same assignee as this invention and whose disclosure is incorporated by reference herein, there is disclosed a reciprocating pump including a housing, a piston slideably mounted within the housing for a reciprocating movement, a shaft connected to the piston and adapted for reciprocating movement concurrently with the piston,
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