.... b) No damage detection, clean and environmentally friendly. c) Add only 15 seconds, convenient, stable and accurate. d) Multi-mode, gold mode, platinum mode, other precious metal mode can be switched. e) Multi-functional, can measure the purity of
.... b) No damage detection, clean and environmentally friendly. c) Add only 15 seconds, convenient, stable and accurate. d) Multi-mode, gold mode, platinum mode, other precious metal mode can be switched. e) Multi-functional, can measure the purity of more
