... 铅锤线 Plumb lines 铅锤线 Plumb lines 气压表 Barometers ...
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... 铅锤,plumb bobs； 铅垂线,Plumb lines； 高频仪器,high-frequency apparatus； ...
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inverse plumb lines 倒垂
vertical lines out of plumb 铅垂线
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同义词： perpendicular
以上来源于: WordNet
N-COUNT A plumb line is a piece of string with a weight attached to the end that is used to check that something such as a wall is vertical or that it slopes at the correct angle. 铅垂线
Using traditional plumb lines in elevator guide rails' installation is difficult to ensure the installation accuracy, wasting time and Labour.
电梯导轨安装精度以往多采用吊线锤法，一般很难保证导轨的安装精度，且费时、费力。
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