GB/T 22093-2008 "Electronic Digital Display Inner Diameter Micrometer" standard, standardizes matters related to electronic digital display inner diameter Micrometer. Clarify its form, basic size and Measurement range, and specify key parameters such as digital display function and accuracy. Put forward strict requirements for product manufacturing accuracy, electrical performance, anti-interference ability, etc., and formulate detailed test and inspection methods. Also standardize product labels, Encasement, etc., to provide a unified technical basis for the production, mass testing, market circulation and use of the measuring tool, and ensure accurate and efficient inner diameter measurement.