| 单词 |
y-level |
| 释义 |
Y-level
Y-level n (Surveying) surveying a level mounted on a Y-shaped support that can be rotated Y-level
wye levelA surveyor’s leveling instrument having a telescope and attached spirit level, mounted in Y-shaped supports which permit it to be lifted and reversed, end for end; it is used in the direct measurement of differences in elevation. |
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