indicator that establishes the horizontal when a bubble is centered in a tube of liquid
双语例句
用作名词 (n.)
A surveying instrument consisting of a spirit level and a sighting tube,used to measure the angle of inclination of a line from the observer to the target. 由一个水平仪和一个观测管组成的测量工具，用来测量从观测者到目标的直线的倾斜角。
Plot the altitude of the crossroads and other significant sites of the northern plateau with no other instrument but our stone mason's level. 在除了石制水平仪之外，没有其他仪器的情况下，测量出十字路口以及北部高原重要地点的海拔高度。
