YY/T 1807-2022 Rapid non-destructive testing of main components in metal materials for dental restorations Hand-held X-ray fluorescence spectrometer method (semi-quantitative method) (English Version)
2022YY/T 1807-2022 Rapid non-destructive testing of main components in metal materials for dental restorations Hand-held X-ray fluorescence spectrometer method (semi-quantitative method)