propane

The section chief introduced the unit of measurement of methanol and dimethylmethane propane for UNICASE furnace to Hu Yubing.

工段长对胡玉讲解UNICASE炉甲醇和丙压力计量单位；

So some renovations should be made,for example,increasing the solvent ratio of propane deasphalting;using hydrofinishing instead of clay treating;mo...

例如:增加丙青的溶剂比,用加氢补充精制代替白土精制等,此外,在含硫原油生产基础油时,对原油也应适当选择。