Well wastewater sewage is a closed system. It's completely separate from the storm drains.
唔，污水管道是全封闭的系统，和暴雨下水管道完全分离。
Sewage water treatment system has advanced and separate rain water and sewage systems.
污水处理系统，采用先进的雨污分流管网。
Sewage water treatment system has advanced and separate rain water and sewage systems.
污水处理系统，采用先进的雨污分流管网。
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