The aperture micrometer is a high-precision measuring tool for inner hole measurement. In the measurement, due to its three-claw automatic centering, spiral differential reading and high measurement accuracy, it is widely used in practical work. In order to solve the problem of detecting the aperture micrometer, we use 60 according to the structural characteristics of the three-jaw aperture micrometer. The V-shaped iron and a grating sensor are combined to form an aperture micrometer measuring instrument.
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