7 Machine tools, parts and components of machines for general industrial use, namely, conveyor idlers, fairleads, support rollers, aligning rollers, diablo rollers, crane rollers, cableway pulleys, deflection pulleys, pinch rollers, wire guidance rollers, conveyor belt rollers, plate link chain pulleys, supports for pulleys, idle rollers, take-up rollers, flattening rollers, printing rollers for machines, belt pulleys, bearing bushing, guide bushes, pillow blocks, bearing segments, sliding blocks, guides, sliding plates, guide strips, protection strips, feeders, thrust washers, wheelworks, pot hooks of metal, bevel wheels, worm wheels, cam sprockets, metering wheels, infeed star wheels for bottles, archimedian screw pumps, cam discs, manifold connectors, centering bells, support rings, valve seats, rammer plates for compactors, cutting and punching plates, ejector drums, molds for casting concrete or plastic materials, all the aforesaid goods being of plastic, in each case as a finished product or blank for use as machine parts