... and silver jewelry,jewelry,hair,accessories,brooch,glasses,watch,chain,pen,CD,scraping,knives,combs,toothbrushes,dentures,tea,etc. ... shell,with the whole into appropriate cleaning agent(such as gasoline)tank cleaning,cleaning can get a multiplier effect.5. ... and other electrical appliances,precision circuit boards,parts used. high quality manufacturer of sliver products ultrasonic cleaning machine