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.
specialty tools and parts therefor-namely, spears, line wipers, bailers, bumper subs, blanking plugs, wire line blocks, blowout preventers, overshots, casing expansion joints, wipers, casing rollers, casing scrapers, die collars, jars, control heads, couplings, subs, cutters, oil well jars, junk mills, junk subs, lubricator accessories, lubricator unions, mill guides, milling shoes, mud desanders, oversize guides, packer retrievers, power subs, power swivels pump rod oilers, stabilizers, rope sockets, rotary shoes, strippers, taper taps, sinker bars, skirt guides, stuffing boxes, lubricator swages, tool traps, blanking plugs, unlatching joints, wall hook guides, washover shoes, whipstocks, wing unions, wire line retrievers, overshot bowls, cable guides, cable hangers, cable injectors, wire line cleaners, differential pressure regulators, drills, wire line grabs, guided mill assemblies, hand hoists, high pressure seal assemblies, jet boot baskets, knuckle joints, liner hangers, liner washers, paraffin scrapers, power kellys, power subs, swivels, transfer assemblies, and tubing injectors