| 单词 | Abney level |
| 释义 | Abney level (extremely rare) n WORD FAMILY Abney level 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 Hyper surveyor's level surveying instrument consisting basically of a small telescope with an attached spirit level rotating around a vertical axis; for measuring relative heights of land |
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