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    1石油天然气学报 ( 江汉石油学院学报)2 0 1 3 年 4 月 第 3 5 卷 第 4 期 J o u r n a l o f O i l a n d G a s T e c h n o l o g y ( J . J P I )A p r . 2 0 1 3 V o 1 . 3 5 ...

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