1)reference ga[u]ge,校对测规，校对量规校对计2)reference gauge,校对测规3)reference gage,校对量规4)standard of proofreading,校对规范5)master ring gauge,校对环规6)reference device,校对规
用法和例句
Based on the analysis of measuring principle of pneumatic gauge head,a high-precision pneumatic gauge head for taper measurement and its reference device are designed.