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单词 plumb line
释义 Noun: plumb line  plúm lIn
  1. A cord from which a metal weight is suspended pointing directly to the earth's centre of gravity; used to determine the vertical from a given point
    - perpendicular

Derived forms: plumb lines

Type of: cord

Encyclopedia: Plumb line

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更新时间:2024/12/21 18:12:58