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Rsp60 Piezoelectric Disc Pzt Material 60*30*10mm Ultrasonic Ceramic Piezo Elements for Ultrasonic Welding Machine, Find Details and Price about Ceramic Ring Ultrasonic Welding Machine from Rsp60 Piezoelectric Disc Pzt Material 60*30*10mm Ultrasonic Ceramic Piezo Elements for Ultrasonic Welding Machine - K&M Technologies Ltd.