petroleum tar meaning in Chinese
石油柏油
石油残渣油
石油焦油
石油沥青
Examples
- Abstract : the utilization and the prepartion methods of 2 , 6 - dmn are introduced . the separation and purification processes of 2 , 6 - dmn from coal and petroleum tar are reviewed
文摘:本文介绍了2 ， 6 -二甲基萘的用途和制备方法；综述了从煤焦油和石油中分离提纯2 ， 6 -二甲基萘工艺。