American Valero Energy Corp. rose rapidly in a short period and became North America 's largest refining manufacturer.

美国瓦莱罗能源公司在短短时间里迅速崛起，一举成为北美最大的炼油生产商。

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Furthermore, some reasonable advices are given and they should be beneficial to enhance more energy saving in deoxidization period of copper refining anode furnace.

此外，给出了一些合理化建议，有利于铜精炼阳极炉还原期节能效果进一步提高。

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Refining companies Valero Energy, Sunoco and Tesoro all took a hit financially during that time (the most recent period for which data are available) largely because of high crude prices.

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