Jisho

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Noun
1. spirit level; level; leveling instrument; levelling instrument
Wikipedia definition
2. Spirit levelA spirit level or bubble level is an instrument designed to indicate whether a surface is horizontal (level) or vertical. Different types of spirit levels may be used by carpenters, stonemasons, bricklayers, other building trades workers, surveyors, millwrights and other metalworkers, and in some photographic or videographic work. Original spirit levels had two banana-shaped curved glass vials at each viewing point and were much more complicated to use.
Read “Spirit level” on English Wikipedia
Read “水準器” on Japanese Wikipedia
Read “Spirit level” on DBpedia

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