一条排放生活污水、业废水和屋顶的雨水，另一条排放除此之外的其它雨水。
One sewer receives domestic sewage, trade effluent and rainwater from roofs only and the other all remaining rainwater.
一条排放生活污水、业废水和屋顶的雨水，另一条排放除此之外的其它雨水。
One sewer receives domestic sewage, trade effluent and rainwater from roofs only and the other all remaining rainwater.
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