英语词汇“plumb rule”是什么意思，“plumb rule”的读音、用法及例句翻译-烛光网

词汇	plumb rule
释义	plumb rulen.（名词） A narrow strip of wood with a plumb line and bob attached, used to test verticality.垂规：带有一段铅锤线和铅锤的一条狭窄的木条，用来检验垂直度
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