Study on the micro-characteristics of low Permealility reservoir in sand 4-7 of Sha 2 segment in southern area of Pucheng Oilfield是什么意思_Study on the micro-characteristics of low Permealility reservoir in sand 4-7 of Sha 2 segment in southern area of Pucheng Oilfield在线翻译_英语_读音_用法_例句