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See Chinese contents: GB/T 40742.1-2021 GB/T 40742.1-2021: Geometrical product specifications (GPS) -- Geometrical precision verification -- Part 1: Basic concept and measurement -- Symbol, terminology, measuring conditions and procedures
This document specifies the basic concept and measurement, terminology, symbol, measuring conditions and procedures of geometric precision verification. This document applies to the detection and verification of geometrical characteristics such as product size, shape, position, surface structure.
