#clamp  a device (used by carpenters) that holds things firmly together
  supertype:  holding_device__holdingdevice  a device for holding something
  subtype:  bench_clamp__benchclamp  a clamp used to hold work in place on a workbench
  subtype:  C-clamp  a clamp in the shape of a C
  subtype:  cramp  a clamp for holding pieces of wood together while they are glued
  subtype:  pipe_vise__pipe_clamp  a clamp for holding pipe that is to be cut or threaded
  subtype:  press.clamp__pres  clamp to prevent wooden rackets from warping when not in use

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