3 D complex drainage body 三维复杂排渗体
It had incredible public amenities, footpaths, schools, an indoor bath, complex drainage and enclosed fields.
城里有难以置信的公共设施：人行道、学校、室内浴场、复杂的排水系统和围起来的农田。
In the late production period of gas well, complex drainage gas recovery technology is the important measure for raising the recovery efficiency of gas reservoir.
分析并提出气井各生产阶段的工艺技术措施与对策，气井生产后期应用复合型排水采气技术是提高气藏采收率的重要措施。
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