7
Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); agricultural implements other than hand-operated; incubators for eggs.
positive displacement pumps for oil wells and replacement parts therefor, namely, ball valves and seats, barrels, plunger bodies, bushings, cages, plunger connectors, barrel connectors, sucker rod connectors, slider valve connectors, barrel couplings, plunger connectors, rod couplings, seating cup couplings, change cover couplings, guides, holddowns, mandrels, nipples, shoes, nuts, plugs, plungers, rings, cups, rods, spacers, tubes, valves, seals and liners