For soft beam-stiff half space system, wave speeds in beams are also critical velocities.
对软梁-硬半空间系统，梁的剪切波速和压缩波速也是临界速度；
2
The convergent and divergent velocities of active plate boundaries in the north hemisphere are obtained with space geodetic data.
利用现代空间大地测量技术测出北半球活动板块边缘会聚、扩张和滑动速度。
3
Air Force Space Command data show that when the kill vehicle impacted the target satellite, debris was ejected from the impact point at velocities of up to 1,400 MPH. (2,000 FPS.).