如果你看气相，或液相中分子的运动。
If you look at molecules moving around in the gas phase or in a liquid.
油气分离器是一种利用气液两相流体的旋转运动，使液体油滴在离心力的作用下从气流中分离出来的设备。
Oil-air separator is a sort of equipment that makes the air and oil droplet revolve together and makes the oil droplet separate from the mixture in the function of centrifugal force.
清管球的运动速度取决于气液混合速度和在管道中的位置，而清管球前后的压差也和气液混合速度以及在管道中的位置有关。
The moving velocity and pressure drop of the pig depend on the homogeneous mixture and the locations of the pig in the pipeline.
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