The important feature that works in an amplifier is an Air Inlet Port, Air Drive Tube
, Drive piston, Upper Tappet Valve, Pilot Air Tube, Spool Valve, Lower Tappet Valve, and Pilot Vent, Outlet Muffle
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The important feature that works in an amplifier is an Air Inlet Port, Air Drive Tube
, Drive piston, Upper Tappet Valve, Pilot Air Tube, Spool Valve, Lower Tappet Valve, and Pilot Vent, Outlet Muffle