PULSED MULTI-FREQUENCY SCANNING ULTRASONIC EQUIPMENT. (IMAGE) KeAi Communications Co., Ltd. Caption Pulsed multi-frequency scanning ultrasonic equipment. 1: computer control system; 2: ultrasonic generator; 3: ultrasonic pool; 4: sample treatment vessel; 5: water; 6: ultrasonic transducer. Credit Rong Zhang et al Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.