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  • Measurements and Measuring Instruments
Calibration is a quantitative comparison. Check the reading of the instrument, it is achieved by measuring the actual standard part, and the deviation between the measured value and the actual value is corrected.
Engaging in quantitative observation cannot rely solely on human senses, such as vision, hearing, touch, etc., and often requires tools, that is, measuring instruments. Measurement refers to the numerical representation of the size of a manufactured object based on a certain standard (unit).