... industryOven tray, boiler, bottles, bottle cap, filters,etcOptical& watch makeroptical lens, eyeglass, sunglass, metal, gold, jewelry, diamond, watch band, watch ... cameras and other parts of the parts of the lens by ultrasonic cleaning ,etc.all the world the truth filling ... often unable to do anything,and V-KOOL special ultrasonic cleaner is unique wonders.4.Watches,precision instruments:with the ...