twist drill

名词 n.
中文释义
发音 twĭstʹdrĭl'

英文释义

名词 n.
  1. A rotating cutting tool, used for cutting holes in rigid materials, that consists of an essentially conical point, relieved and fluted to form cutting lips, and spiral flutes which direct the chips away from the lips and toward ejection from the hole.

词形变化

twist drills plural
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