grease sludge
油污泥
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Next up is the primary sedimentation tank, where sludge settles to the bottom and lighter liquids like grease, oil and soap rise to the top.
下一步就是一级沉淀池，污泥沉淀到底部，轻质液体例如油脂、油和皂类浮到上面。
youdao
Spurred by the 2007 raid, Knollwood solved its backup problem by cutting a new manhole and clearing a buildup of lime, grease and sludge.
WSJ: Federal Offenses: Sewage Blunder Earns Building Engineer a Criminal Record
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