水すい準じゅん儀ぎ

noun

surveyor's level; leveling instrument

A precision optical instrument used in surveying and construction to establish a horizontal line of sight. The term covers various types including dumpy levels and automatic levels.

• 測そく量りょう士しは水すい準じゅん儀ぎを使つかって土と地ちの高こう低てい差さを測はかった。

  The surveyor measured the elevation difference of the land using a leveling instrument.