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.
[ steam engines, ]steam-turbines, turbo-compressors, turbo-blowers, turbo-exhausters, reciprocating compressors, portable air-compressors, gas-compressors, gas-boosters, gas-expanders, gasolene-extraction compressors, regulating devices for compressors, valves for compressors, air-lift pumps, return-air pumping systems, vacuum-pumps, centrifugal pumps, reciprocating pumps, sinking-pumps, marine pumps, [ tire-pumps, steam condensers, ]air-receivers, intercoolers, aftercoolers, air-filters, air-reheaters, pneumatic motors, pneumatic hoists, rock-drills, hammer-drills, pneumatic drills, rotary drills, submarine drills, pile-drivers, core-drills, coal-punchers, core-breakers, coal-drills, coal-shearing machines, stone-channeling machines, coal cutters and loaders, coal-picks, drill-bits, hollow and solid drill-blanks, chisel-blanks, mountings for drills, rock-drill columns, quarry-bars, tripods and gadder-frames, lubricating devices, water-spray attachments, drill-throttles, drill manifolds and headers, shank and bit punches, drill-sharpeners, blacksmith-tools for forming shanks and bits on rock-drill steel, sand-pumps, pneumatic stone-dressing tools, pneumatic saws, pneumatic rammers, portable pneumatic grinders, mounted grinding-wheels, pneumatic hammers, riveting-hammers, chipping-hammers, scaling-hammers, wood-boring machines, close-quarter drills, tamping-machines, railway-tie tampers, spike-drivers, drift-bolt drivers, plug-drills, calking-machines, rivet-sets and retainers therefor, jam-riveters, rivet holders-on, grease-guns, [ fusible signal plugs, ] oil-engines, [ ticket canceling boxes, ] component parts of and repair parts for all of the above devices