sewage backflow造句

"sewage backflow"是什么意思

造句与例句手机版

A : All connected sewerage customers will receive the following services : proper maintenance and operations of public sewer treatment plants where your sewage will be treated; and upkeeping of public sewer network to ensure that there are no blockages or broken pipes which can cause sewage backflow and overflowing manholes.
It's difficult to see sewage backflow in a sentence. 用sewage backflow造句挺难的

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