7 Metalworking machines, namely, metal sawing machines, metal grinding machines, metal cutting machines, metal drilling machines, electric metal-cutting machines using plasma, and electric welding machines; metalworking machine tools; power-driven hand-held tools, namely, pneumatic drills, pneumatic hammers, sanders for metalworking, wrenches for metalworking, grinders, drills, hammers, screwdrivers, polishers, and shears; mining machines, namely, rock drills; construction machines, namely, earth augers, pile-drivers, concrete vibrators, and concrete mixers; loading-unloading machines, namely, winches and hoists; loading-unloading machines, , namely, carts, buckets and wheelbarrows sold as an integral part thereof; lumbering, woodworking, and veneer- or plywood-making machines, namely, lumbering band saws, chain saws, circular saws for woodworking, wood planing machines, wood drilling machines, sanding machines for woodworking, wood sawing machines, and electric glue guns; plowing machines, other than hand-held tools, namely, power tillers; stone working machines, namely, drills, hammers, grinders, concrete planers, and cutters; pneumatic and hydraulic machines, namely, pumps, centrifugal pumps, vacuum pumps, blowers, compressors, and compressed air machines; stirring and mixing machines for industrial purposes; electric wax-polishing machines for industrial purposes; vacuum cleaners for industrial purposes; lawnmowers; cultivator machines; power-operated hedge trimmers; agricultural machines, other than hand-operated, namely, electric scissors for pruning and electric shredders for branches; chain saws; power sprayers for insecticides, and deodorants, all for disinfecting, and not for agricultural purposes; electric power generators, not for land vehicles; pile-drivers; vacuum cleaners; electric arc-welding machines; electric metal-cutting machines using arc, gas or plasma; Electric air plasma welding machines