For highly heterogeneous reservoirs, chemical flooding after profile control is an important way for improving oil displacement effectiveness.
对于非均质性严重的油藏，先调剖再注三元复合体系段塞，这是提高化学驱油效果的重要途径。
Discusses correlations between ventilation effectiveness and air distribution, analyses why the ventilation efficiency of mixing ventilation is lower than that of displacement ventilation.
讨论了通风有效性与空气分布特性的相关性，分析了混合通风（上送下回）通风效率低于置换通风效率的原因。
Objective To evaluate the effectiveness of cerebrospinal fluid displacement on the treatment of subarachnoid hemorrha.
目的探讨大剂量脑脊液置换法治疗蛛网膜下腔出血的优势。
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