plumb-line

基本解釋

Plumb-line breaking accident of dam safety monitoring system of Feilaixia Hydro Project is analyzed in this paper.
本文主要介紹了飛來峽大壩安全監(jiān)測系統(tǒng)垂線斷裂的事故經(jīng)過及斷裂原因。
This article gives an easy way in which laser plumb line is set up by means of He-Ne laser in space with the liquid level as the base.
本文敘述以液面為基準(zhǔn)面，用小型氦-氖激光器在空間建立激光垂直線的簡易方法。
Total lumbar lordosis, thoracic kyphosis, sacral slope, and C7 plumb line were measured on the pre- and postoperative whole spine lateral views.
在術(shù)前、后全脊柱側(cè)位片測量腰椎總前凸、胸椎總后凸、骶骨傾斜度和頸7鉛垂線。

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.