#life_preserver__preserver__flotation_device__flotationdevice  rescue equipment consisting of a buoyant belt or jacket to keep a person from drowning
  supertype:  #rescue_equipment  equipment used to rescue passengers in case of emergency
  subtype:  #life_buoy__lifesaver__life_belt__life_ring  a life preserver in the form of a ring of buoyant material
     subtype:  #breeches_buoy  a life buoy in the form of a ring with short breeches for support; used to transfer people from a ship
  subtype:  #life_jacket__life_vest__cork_jacket  life preserver consisting of a sleeveless jacket of buoyant or inflatable design
     subtype:  #air_jacket__airjacket__Mae_West  an inflatable life jacket
  subtype:  #water_wings__waterwing  a life preserver consisting of a connected pair of inflatable bags that fit under a person's arms and provide buoyancy; used by children learning to swim

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