亚声速流
sub-critical flow
subsonics
flow at subsonic velocity
subsonic 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
Speed of sound
ultrasonic pulse velocity
velocity of ultrasonic sound
ultrasonic velocity
Ultrasonic sound velocity
超声声速测量
Ultrasonic velocity measurement