73060519
Aug 14, 1975
Jul 26, 1977
BALL VALVES, CHECK VALVES, GATE VALVES, FOUR-WAY SHOE TYPE VALVES, SHUTOFF VALVES, AND SOLUBLE PLUG INJECTOR VALVES
Metal GoodsCONSTANT RATE-OF-FLOW CONTROL VALVES AND BACK PRESSURE CONTROL VALVES
Electrical and Scientific Apparatus