final residuum的用法和樣例：
例句
- Many technical problems need be resolved for synthetic gas production based on Ureka pitch instead of residuum.
以尤里卡瀝青替代渣油制取合格的合成氣需要解決許多技術(shù)難題。 - A preparing process of petrolic residuum binder using local raw material is introduced briefly in this paper.
本文簡(jiǎn)要闡述了試制渣油粘結劑的過(guò)程。
