... 石油馏分 Petroleum cut，Petroleum fraction 石油的灰分 Ash of oil 石油的颜色 Colour of petroleum ...
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ash of oil-burnning boiler 燃油锅炉灰垢
This oil possesses characteristics of high viscosity, high flash point, low ash, low residual carbon and low evaporation loss, so as to meet the requirements of users.
该油具有高粘度、高闪点、低灰分、低残炭、低蒸发损失等特点，可满足用户需要，具备生产条件。
A classification table of oil shale ash composition is given out.
提出了油页岩灰分成分的分类表。
The optimum condition of fly ash treating oil-wastewater was researched.
研究了粉煤灰处理冶金含油废水的最佳工艺条件。
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