GB/T 17421.1-2023 General rules for inspection of machine tools Part 1: Geometric accuracy of machine tools under no-load or quasi-static conditions (English Version)
2023GB/T 17421.1-2023 General rules for inspection of machine tools Part 1: Geometric accuracy of machine tools under no-load or quasi-static conditions
1998GB/T 17421.1-1998 Test code for machine tools. Part 1: Geometric accuracy of machines operating under no-load or finishing conditions