abney y level手水准仪
abney level detail手水准仪
Abney hand-level亚伯尼手持水准仪;埃布尔尼手持水平仪
N(名词) 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 another point 阿布尼测斜仪; 用于测量两点之间线的倾角