7 Electrical and mechanical machine tools for use on machines for metalworking; machine parts, namely, polishing disks and polishing wheels for metalworking machines; machine tools, namely, metalworking machine tools in the nature of dies, sheet metal rollers, drill tools, rivet hammers, grinders, broaches, lathes, shapers, electric planers, industrial machine presses, clamps used for holding piece parts on machine tool tables, and power operated metal working machine tools, namely, drilling tools, boring tools, milling tools, and turning tools, excluding tools for grinding screw threads and chasers; pounding machines for pounding metal; polishing machines for use in polishing metal, excluding machines for grinding screw threads and chasers; electric motors not for land vehicles, hydrostatic drive transmissions not for land vehicles, linear motor transmissions, robotic systems, namely, robotic arms for industrial purposes, all for machine tools; calibrating devices for workpieces, namely, sizing devices for metalworking machines; washing machine stations for industrial workpieces, being parts of machine tools and designed for use with machine tools; enclosures for surrounding machine tools to exclude dust, dirt, and humidity from the machine environment, namely, shields, bulkheads, and boxes, being parts of machines; parts and component parts for all the aforesaid goods, except cutter heads and collapsible taps