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单词 plumb rule
释义

plumb rule

noun
A plumb line attached to a board, used by builders and surveyors.It is customary in laying blocks to use a plumb rule to ascertain the level alignment of the block which is being positioned on the wall....
  • It is used in a horizontal position as a level and in a vertical position as a plumb rule.
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更新时间:2024/12/23 16:55:24