preasphaltene

preasphaltene

美 　英

• 网络前沥青烯；预沥青烯

例句

The results show that in the initial phase of reaction, coal is mainly converted to preasphaltene, asphaltene and a little oil and gas.

研究结果表明：在反应起始阶段，煤主要转化为前沥青烯和沥青烯，有少量油气存在。

With the extend of time, the yield of preasphaltene and asphaltene reaches the maximum and the yield of oil and gas gradually increases.

随反应时间的延长，前沥青烯和沥青烯产率出现最大值，油气产率逐渐增加。