73297843
Mar 27, 1981
Feb 2, 1982
Steel Cylinders Used as Liners for Oil Well Mud Pumps and Cement Pumps; Centrifugal Pumps for Pumping Oil Well Drilling Fluids, and Reciprocating Valves and Pistons for Mud Pumps
MachineryHand-Operated Valve Lifting Tools for Removing Valves from the Fluid End of Reciprocating Pumps
Hand ToolsReplacement Rubber Sealing Elements for Stem Valves, and Replacement Rubber Piston Elements for Reciprocating Pistons
Rubber Goods