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plumb rule

n. a plumb line attached to a narrow board

1、[建]垂规

... plumb position 铅锤位置 plumb rule 垂规 plumb 铅锤；测锤 ...

2、锤规

... sideways heat equation 热传导终端反问题 plumb rule 锤规 plumb rule 垂规 ...

3、垂线尺

... plumb position 铅垂位置 plumb rule 垂规; 垂线尺 Plumbagella 小蓝花丹属 ...

土木建筑工程

n.a plumb line attached to a narrow board

1.
N（名词） a plumb line attached to a narrow board, used by builders, surveyors, etc 锤规

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