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Standard (metrology)
? TBD
Object, system, or experiment which relates to a unit of measurement of a physical quantity
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In metrology (the science of measurement), a standard (or etalon) is an object, system, or experiment that bears a defined relationship to a unit of measurement of a physical quantity. Standards are the fundamental reference for a system of weights and measures, against which all other measuring devices are compared. Historical standards for...

Subclass of
Technical standard
Convention (norm)
measure
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