When oilfield development is in medium-later period, gas will occur in fluid flow due to the draw down of reservoir pressure.

当油田开发到中后期，由于地层压力的下降，实际上往往有气相参与流动。

youdao

Graduate, create, say to be one summary of study and life for less than four year, four year in everybody youthful time draw down the intact period.

毕业创作可以说是四年学习生活的一个总结，为每个人的四年青春岁月划下完整的句点。

youdao

Graduate, create, say to be one summary of study and life for less than four year, four year in everybody youthful time draw down the intact period.

毕业创作可以说是四年学习生活的一个总结，为每个人的四年青春岁月划下完整的句点。

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