This experiment is an absolute necessity in determining the best processing route.

对确定最佳工艺流程而言，这次实验是绝对有必要的。

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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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