China China 28 khz miniature ultrasonic transducer for ultrasonic Cell disruption instrument factory and manufacturers | Powersonic factory and manufacturers | Powersonic
Model 3040-4z Four Pieces of Ceramics 40kHz High Power Welding PVC Welding Machine Ultrasonic Transducer - China Ultrasonic Transducer, Welding Converter | Made-in-China.com