... generation good 600ml mini ultrasonic electric jewelry cleaner VGT-800 with CE and rohs Ultrasonic Cleaner,Ultrasonic cleaner,mini ultrasonic ... to jade , ornaments.The form of them are complicated with many gaps ,so,traditional method is suitable for no longer ... : Have ultrasonic cleaner ,you shouldnt Dismount screw , gear wheel , hairspring spring , watch chain etc. one by one , just disboard covering ...