... 30 days Ultrasonic cleaning machine IndustryCleaning objectsjewelryJewelry, diamond, gold, silver products,etcmachineryMoulds, precision parts, pressing parts, ... filters,etcOptical& watch makeroptical lens, eyeglass, sunglass, metal, gold, jewelry, diamond, watch band, watch cover, watch hand ... by inkpad of buildup,commonly used WELGO special cleaner can guarantee clear and smooth.if combined with ...