Stainless Steel Ultrasonic Vibrating Sieve For Grading Powder - DahanVibratingMachinery ( China ) - Offers to Sell and Export - Wednesday 27 September 2017 8:34 am - stainless steel ultrasonic vibrating sieve for grading powder product introduction ultrasonic grading sieve is able to convert electric energy with 220v 50hz or 110v 60hz into high frequency electric energy ...