... as gold and silver jewelry,jewelry,hair,accessories,brooch,glasses,watch,chain,pen,CD,scraping,knives,combs,toothbrushes,dentures,tea,etc ... :the grinding and polishing process,a lot of dust buildup in the dirt will jade ornaments,and these parts are often ... and other electrical appliances,precision circuit boards,parts used. Made in china ultrasonic cleaning machine for toothbrush