变声速
variation of the sound velocity
表层声速仪
surface sound velocity meter
超、高超声速
Supersonic and Hypersonic
超声波声速计
ultrasonic wave velocimeter
超声横波声速
ultrasonic transversal wave velocity
超声声速
velocity of ultrasonic sound
ultrasonic velocity
Ultrasonic sound velocity
ultrasonic pulse velocity
Speed of sound
超声声速法
ultrasonic velocity method
超声声速与衰减
Ultrasonic velocity and attenuation
沉积物声速
Acoustic velocity of sediment
sediment compressional velocity
等温声速
isothermal speed of sound
等效声速剖面
equivalent sound velocity profile