亚声速流
subsonics
flow at subsonic velocity
subsonic flow
sub-critical flow
超声速射流装置~+
Supersonic jet flow facility
横向流亚声化学激光器
transversal flow subsonic chemical laser
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