Machines and machine tools; motors and engines (except for land vehicles); machine coupling and transmission components (except for land vehicles); compressors; air compressors; piston compressors; air/water separators; compressed air guns; spray guns; electric grinders; pneumatic hammers; couplings (other than for land vehicles); valves (parts of machines); power-operated staple guns; vacuum cleaners; lubricators (parts of machines); chisels for machines; filters (parts of machines); power-operated tools, namely grinders; drain cocks