Y level
noun1
A surveyor's instrument for measuring differences of level by means of a telescope resting in a Y-shaped support.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
noun
A surveyor's instrument for measuring differences of level by means of a telescope resting in a Y-shaped support.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.
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