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.
oil well tools and parts thereof-namely, cutters and cutting knives, subs, bits, swages, spears, overshots, fishing tools, guides for overshots and fishing tools, shoes, mills and milling tools, fishing taps and baskets, blocks, samplers, drilling and coring tools, [ packers, ] plugs, [ cement retainers, ] setting tools, [ perforators, ] jars, cleaners, bailers, joints, couplings, connections, and the like; [ oil well pumps; internal combustion engines; dehydration plant equipment for gas wells and parts thereof, comprised of dehydrators, contactors, heat exchangers, heaters, condensers, and separators ]