Heavy oil processing is a very important way to make reasonable use of petroleum resource.

重油深度加工是合理利用石油资源的重要途径。

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Deep processing of heavy oil is an important route in refinery.

提高重质油深加工是炼油厂挖潜增效的重要途径。

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Deep processing of heavy oil is an important route in refinery.

提高重质油深加工是炼油厂挖潜增效的重要途径。

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