In annular space, the values of tangential, axial and radial turbulence intensity were of the same order of magnitude.
环形空间3个速度分量的湍流度是同一个数量级的。
When there is a foam column is the annular space of a pumping oil well there will be no distinct gas-oil interface.
当抽油井的环形空间中出现泡沫段时，将会失去明显的油-气界面。
Adding air pressure within the annular space between the housing and sleeve can throttle, or close the valve.
在阀体外壳和套管之间的环形空间内施加气压，即可实现阀门的节流和关闭功能。
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