激光多普勒测速技术(LDA)，是一种流体速度的无接触式光学测量方法。
Laser Doppler Anemometry (LDA) is a non-contact optical method for measuring flow velocity.
激光多普勒测速雷达技术利用激光多普勒效应测量固体目标的运动速度，或者流场速度分布。
Velocity of solid targets and velocity distribution of flowing fields can be measured by Laser Doppler Velocimeter (LDV) technology based on Doppler Effect.
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