There is actual demand for water reuse for expressway service area given the fact of limited water resource and long distance to municipal water supply system.
高速公路服务区远离市政给水管网，用水紧张，有污水回用的现实需求。
An unlimited backup water supply, essential raw cooling water system (or called service water system) is supplied to the auxiliary feedwater system.
另一路的备用水来自原水系统(或称为厂用水)，当需要时可以不间断地向辅助给水系统供水。
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