the primary settling tank
the primary settling tank
主沉淀池
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Sewage sludge which mainly comes from the primary settling tank and discharge of surplus sludge is the deposit produced in each operating unit in municipal wastewater treatment plant.
城市污泥是城市污水处理厂经各级处理净化污水而产生的沉积物，主要来自初沉池和剩余污泥的排放。
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