Dab tsi yog daim ntawv thov rau digital ultrasonic tu tshuab?

Digital ultrasonic tu tshuab yog tsuas yog siv rau kev tu txhua hnub siv cov khoom xws li kub thiab nyiaj hniav nyiaj hniav kub, hniav nyiaj hniav kub, headdress, brooch, ntim, tsom iav, optical instruments, tsev txhab nyiaj, chaw ua hauj lwm, nyiaj txiag, arts thiab crafts, advertising kev lag luam thiab lwm yam khoom siv hauv chaw ua hauj lwm. .