7 Metalworking machines and metalworking machine tools, and accessories for metalworking machines in the nature of replacement parts for the foregoing; lathes for metalworking machines, milling machines, grinding machines for metalworking, drilling machines, rolling machines for rolling metals, lapping machines; metalworking tools, namely, lathe tools, milling tools, grinding tools, drilling tools, rolling tools, lapping tools all for use as parts of machines; metalworking tools, namely, tool bits, milling cutters, end mills, power-operated grinding wheels, power drill bits, reamers being machine tools, taps being machine tools, dies for use with machine tools; accessories for metalworking machines, namely, machine tool holders, work holders; accessories for metalworking machines, namely, collets, drill chucks, milling chucks, lathe chucks, mandrels, live centers, dead centers; agricultural machines and agricultural implements other than hand-operated, namely, power tillers, power operated cultivators, harvesters and structural parts thereof; plastic processing machines; non-electric prime movers not for land vehicles, namely, steam engine boilers, internal combustion engines not for land vehicles, steam engines not for land vehicles, jet engines not for land vehicles, rocket engines not for land vehicles, turbines not for land vehicles; parts of non-electric prime movers for land vehicles, namely, carburetter, injectors for engines, cylinder heads for engines, joints for engines, exhaust manifold for engines, pistons for engines, sealing joints for engines, mufflers for motors and engines, silencers for motors and engines, cylinders for motors and engines, fuel economisers for motors and engines, namely, fuel injectors, fans for motors and engines, exhausts for motors and engines, cooling radiators for motors and engines; machine elements not for land vehicles, namely, shafts, axles, spindles, bearings being parts of machines, shaft couplings and connectors, power transmissions and gearing for machines not for land vehicles and shock absorbers for machines, not for land vehicles, springs being parts of machines not for land vehicles, brakes for machines not for land vehicles, and valves as machine components not for land vehicles