#action_mechanism__action  the operating part that transmits power to a mechanism; "the piano had a very stiff action"
  supertype:  #mechanism  device consisting of a piece of machinery; has moving parts that perform some function
  subtype:  #gunlock  #movement.action_mechanism  #piano_action  #pump_action
  part:  #key.lever
  part of:  #gun  a weapon that discharges a missile at high velocity (especially from a metal tube or barrel)
  part of:  #keyboard  device consisting of a set of keys on a piano or organ or typewriter or typesetting machine or computer or the like
     part of:  #electronic_computer__computer__computing_machine__computingmachine__computing_device__computingdevice__data_processor__information_processing_system  a machine for performing calculations automatically
        part of:  #platform.computer_system  the combination of a particular computer and a particular operating system
     part of:  #pipe_organ__organ  wind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard
     part of:  #forte-piano__fortepiano__piano__pianoforte  a stringed instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds
     part of:  #terminal  electronic equipment consisting of a device providing access to a computer; has a keyboard and display
     part of:  #typesetting_machine__typesettingmachine  a printer that sets textual material in type
     part of:  #typewriter  hand-operated character printer for printing written messages one character at a time

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