electric arc welding apparatus; electric arc welders; electric metal cutting machines by arc; electric plasma metal cutters; electric welding machines for metalworking; electric welding apparatus for metalworking; internal combustion engines, not for land vehicles; mufflers for motors and engines; waterwheels for micro hydroelectric power generation; pumps for machines; engine driven pumps; electric pumps; air compressors for machines; engine driven air compressors; electric air compressors; power transmissions and gearing for machines, not for land vehicles; electric motors for machines, not for land vehicles; AC generators; DC generators; dynamo brushes