da·vit /ˈdevət, ˈdæ-/
 吊艇柱,吊柱


 Dav·it n.  Naut. (a) A spar formerly used on board of ships, as a crane to hoist the flukes of the anchor to the top of the bow, without injuring the sides of the ship; -- called also the fish davit. (b) pl. Curved arms of timber or iron, projecting over a ship's side of stern, having tackle to raise or lower a boat, swing it in on deck, rig it out for lowering, etc.; -- called also boat davits.

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 davit
      n : a crane-like device (usually one of a pair) for suspending
          or lowering equipment (as a lifeboat)