gas-liquid relative velocity
relative velocity and distance survey by microwave
relative velocity cut-off
relative velocity distribution
relative velocity factor
relative velocity method
relative velocity of light
relative velocity potential
sudden-change of joint relative velocity
relative sliding linear velocity
relative steam entrance velocity
relative steam exit velocity
velocity of relative movement
relative change rate of relative electric resistiv
relative yield and relative water use
average velocity， mean velocity
group velocity and phase velocity
ratio of pulp velocity and sire velocity