The upgrading and refining facilities required to turn tar to oil cost billions of dollars, but the technology is tried and tested.
虽然需要将焦油砂转化为石油的升级和精炼设备成本高达数十亿美元，但这种技术仍在尝试和试验阶段。
Our company engaged in oil refining and equipment manufacturers for more than a decade, with rich experience and strong technology.
本公司从事炼油和设备制造十多年，具有丰富的实战经验和过硬的技术。
This article describe get paraffin oil refining technology by analysis and practice, cut down expenses consumption and reduce the production cost.
本文通过分析及实践，得到蜡油的精制技术，节约了大量的费用，降低了生产成本。
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