超声声速
velocity of ultrasonic sound
ultrasonic velocity
Ultrasonic sound velocity
ultrasonic pulse velocity
Speed of sound
超声声速测量
Ultrasonic velocity measurement
超声声速法
ultrasonic velocity method
超声声速与衰减
Ultrasonic velocity and attenuation
差速复合纺纱技术
differential speed composite spinning
different speed complex spinning technology
超声复合电加工
ultrasonic combined electric micro-machining
超声复合力场磁选机
Ultrasonic composite force field magnetic separator
超声复合振动系统
Compound ultrasonic vibration system
超速复原光电二极管
ultrafast recovery photodiode
复复真空泵
reciprocating vacuum pump
复声强器
complex acoustic intensity
复声压相位
the complex pressure phase
complex pressure phase