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Start Over You searched for: Collections World War 2, 1939-1949 Remove constraint Collections: World War 2, 1939-1949 Subjects Ultrasonic Waves -- adverse effects Remove constraint Subjects: Ultrasonic Waves -- adverse effects Titles Relationship of supersonic wave frequency and cellulicidal action Remove constraint Titles: Relationship of supersonic wave frequency and cellulicidal action

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1. Relationship of supersonic wave frequency and cellulicidal action