heavy oil processing unit 稠油加工装置
secondary processing heavy oil 二次加工重油
deep processing of heavy oil 重油深度加工
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。
There are equipment corrosion, insufficient heavy oil processing depth, environmental pollution, lower product quality and other problems in inferior crude oil processing.
加工劣质原油存在设备腐蚀，重油加工深度不足，污染环境，降低产品质量等问题。
That makes processing heavy oil unprofitable for some refineries, since the gains from diesel are outweighed by losses on fuel oil.
柴油所带来的利润不足以冲抵燃油的损失，造成一些重油炼油厂无利可图。
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