打开密封的地下水疏水管道人孔以试图定位进入系统的氚源。
Opening sealed subsurface drain line manways to attempt to localize the source of tritium into the system.
唔，污水管道是全封闭的系统，和暴雨下水管道完全分离。
Well wastewater sewage is a closed system. It's completely separate from the storm drains.
城市废水管网系统中臭气的最常见的发生源主要有下水道总管道和泵站。
The most common emergence of odour comes from the Urban sewage system, mainly in the total pipelines and equipment for treatment.
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