介绍了国外超低硫燃料的生产技术及经济性；
Production techniques and economic characters of foreign superlow sulfur fuels were introduced.
日益严格的环保法规，对生产低硫、超低硫清洁燃料技术提出了更高要求。
Due to increasingly stringent regulations for environmental protection purpose, the requirement for the productive technology of the low sulfur and ultra-low sulfur clean fuel is getting higher.
另外，在氢源燃料电池系统中，如果氢来源于燃料油，那么必须使用超低硫或无硫燃料油。
Besides, the fuels with ultra-low level of sulfur or free of sulfur are required for hydrogen fuel cell if its hydrogen is produced from the fuels.
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