Spirit level
Tool to indicate whether a surface is level or plumb / From Wikipedia, the free encyclopedia
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For the surveying technique, see Spirit levelling.
For other uses, see Spirit level (disambiguation).
A spirit level, bubble level, or simply a level, is an instrument designed to indicate whether a surface is horizontal (level) or vertical (plumb). Two basic designs exist: tubular (or linear) and bull's eye (or circular). 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.
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