plumb line
英 [ˈplʌm laɪn]
美 [ˈplʌm laɪn]
n. (测水深或垂直面用的)重锤线，铅垂线
牛津词典
noun
- （测水深或垂直面用的）重锤线，铅垂线
a piece of thick string with a weight attached to one end, used to find the depth of water or to test whether a wall, etc. is straight
柯林斯词典
- （检查垂直度的）铅垂线
Aplumb lineis 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.
英英释义
noun
- a cord from which a metal weight is suspended pointing directly to the earth's center of gravity
双语例句
- Except at the pole and the equator, a plumb line does not point toward the earth's center.
除在地球的两极和赤道之外，铅锤线并不指向地球中心。 - Study on Influence of Plumb Line Deflection on Transverse Break-through Survey of Tunnels
垂线偏差对隧道横向贯通测量影响的研究 - Think of this as being a plumb line to find* used to find the direction of gravity.
假设这是铅垂。，想想重力方向是怎样的。 - Between perpendiculars adjust with a plumb line so as to make vertical.
垂线间垂线间垂线间的用铅垂线调整使得垂直。 - The plumb line deviation method of determining heights from GPS in local area
GPS在小区域内测定点位高程应用中的垂线偏差方法 - Plumb line deflection varied with time obtained by repeated gravimetry
重复重力测量结果计算垂线偏差的时间变化 - 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.
本文叙述以液面为基准面，用小型氦-氖激光器在空间建立激光垂直线的简易方法。 - Reconstruction and analysis of automatic plumb line monitoring system of Dongjiang dam
东江拱坝垂线自动监测系统改造实践及成果分析 - The smaller the angle of the weak plane, and the larger the water level are, the closer the location of the critical point is to the plumb line through the dam heel, and vice versa.
反倾结构面的倾角愈小、上下游水位差愈大，剪应力临界点的位置愈靠近坝踵铅垂线； - Due to machining accuracy and limited leveling precision of gimbals, there is always an inconsistency between the visual axis and the vertical rotational axis of the digital zenith camera and the plumb line, which leads to a big deviation between measurement precision and theoretical precision.
由于机械加工精度和常平架的调平精度有限，天顶摄影仪的视轴、垂直旋转轴与铅垂线总是存在不一致，导致测量精度与理论精度存在很大的偏差。