... printer head. 2. Glasses and waterproof watch. 3. Metal jewelry like necklace, ring, earring and bracelet. The ultrasonic print ... family applies:Daily things as the the gold ,silver,jewelry , headwear , brooch , glasses , watch chain ,pen , CD, shave palpus knife , comb , ... shouldnt Dismount screw , gear wheel , hairspring spring , watch chain etc. one by one , just disboard covering, and put into ...