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单词 lag-screw
释义

WordReference Random House Unabridged Dictionary of American English © 2024
lag screw′, 
  1. Buildinga heavy wood screw having a square or hexagonal head driven by a wrench. Also called coach screw, lag bolt. See illus. under screw. 
  • 1870–75

lag-screw  (lagskro̅o̅′),USA pronunciation v.t. 
  1. Buildingto fasten with a lag screw.

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