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石油危机促使人们寻找提高石油产量的方法。美国休斯顿市一个研究小组研究出—个独特技术——用木质素使低产油井恢复产量。
The oil crisis has prompted people to find ways to increase oil production. A research team in Houston, USA, has developed a unique technology that uses lignin to restore low-yield wells.