Rubber pelletizers, rubber plasticators, rubber belt making machines, rubber thread cutting lathes, rubber mill mixing aprons, machines for insulating and covering with rubber, rubber cutting machines, rubber strip cutters, rubber breakdown machines, rubber bale cutters, continuous vulcanising machines, plastic calenders, plastic mixers, plastic mills, plastic plasticators, plastic pelletizers, plastic extruding machines, plastic sheet cutters, plastic molding presses, combustion mixers used in the making of phonograph record labels, phonograph record calendars, phonograph record blanking machines, asbestos mixers, asbestos calenders, asbestos sheeters, namely: machines for forming sheets of asbetos fibres; explosive (powder) calenders, explosives (powder) mills, asphalt tile mixers, asphalt tile mills, asphalt tile calenders; hydraulic presses for pressing and/or molding and/or thermosetting Plastics, linoleum, and similar materials; hydraulic presses for blanking and/or forming and/or extruding metal, hydralic lift tables, steam plates for rubber manufacture, steam tables for rubber manufacture, blockers for forming metal coils, coilers for forming metal coils, roller tables for rolling mills, rolling mill pinion stands, rolling mill drives, sugar cane carriers for cane mills, revolving cane knives for cane mills, cane levellers for cane mills, intermediate carriers for cane mills, mechanical juice strainers and trash elevators for cane mills, gears, pinions, gear transmissions; units, shaft bearings, turbine driving transmissions; power transmissions for marine propulsion, speed reducing units, employing gearing; pump rotors, gear generating machines for cutting teeth on gear and pinion blanks, gear cutting tools for use in gear generating machines, gear lapping machines, grinding Machines for gear cutters, and finished steel rolls for rubber and plastics and paper machinery, and speed increasing units employing gearing, pumps and valves included in this class, drill grinders, hydraulic stretchers, all being in the nature of machines and machine tools or parts of machines and machine tools and being included in Class 7