7 machine parts for pneumatic machines, namely, push button valves, cylinders, pneumatic flow control valves, pneumatic valve actuators, pneumatic fluid amplifiers, back pressure sensors, pneumatic counters, valve drawers, pneumatic valves, flow controllers, pneumatic circuits, acrylic subplates, and couplings, namely, hoses, hose fittings, hose barbs, screw plugs, connectors, clips, mufflers, bushings and tube outlets used in connection therewith