对煤焦油沥青进行深加工以提高沥青产品的附加值是煤焦油加工中的一个重要问题。

Further processing of coal pitch to raise the additive value is a key problem in coal tar processing.

youdao

对煤焦油沥青进行深加工以提高沥青产品的附加值是煤焦油加工中的一个重要问题。

Further processing of coal pitch to raise the additive value is a key problem in coal tar processing.

youdao