共 50 条
- [2] ULTRASONIC FOCUSING TRANSDUCER. The Soviet journal of nondestructive testing, 1979, 15 (03): : 261 - 263
- [9] Airborne ultrasonic transducer. ANNALES DE CHIMIE-SCIENCE DES MATERIAUX, 1995, 20 (7-8): : 469 - 472
- [10] ANALYSIS OF A FEEDBACK TRANSDUCER. Report - University of Southern California, Department of Civil Engineering, 1983, (83-3):