US Gulf sour markets gained Thursday as buying interest for the "undervalued" crude increased,reported sources.Refineries returning from maintenance combined with historically low differentials saw Mars numbers gain nearly 2/barrel to minus 11.75/b.The run-up in Mars moved up Poseidon and Southern Green Canyon grades as well similarly.
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机译：消息人士称，周四美国海湾高硫市场上涨，因购买“低估”原油的兴趣增加。精炼厂从维护中返回，加上历史低位差，使火星油价上涨近2 /桶，至负11.75 / b。波塞冬（Poseidon）和南部绿色峡谷（Southern Green Canyon）的等级也是如此。
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