单词：final residuum
final residuum的用法和样例：
例句
- Many technical problems need be resolved for synthetic gas production based on Ureka pitch instead of residuum.以尤里卡沥青替代渣油制取合格的合成气需要解决许多技术难题。
- A preparing process of petrolic residuum binder using local raw material is introduced briefly in this paper.本文简要阐述了试制渣油粘结剂的过程。
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