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In manufacturing and engineering , a device used to determine whether a dimension is larger or smaller than a reference standard.
A snap gauge, for example, is formed like the letter C, with outer "go" and inner "not go" jaws, and is used to check diameters, lengths, and thicknesses. Screw-thread pitch gauges have triangular serrations spaced to correspond with various pitches, or numbers of threads per inch or per centimeter. Deviation-type or
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[c mediumvioletred] (as used in expressions)
{{link=dial gauge">dial gauge
pressure gauge
strain gauge