双语例句
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。
词典释义：
plumb lines
时间: 2025-01-13 20:19:26
铅垂线