"One Network": improving the laying of underground sewage disposal pipes so as gradually to achieve "one network for one city".
“一网” 完善地下排污管网的铺设， 逐步形成“一城一网”。
Water supply network is an important component of water supply systems. Purified water goes through the intricate network of underground pipes to users.
给水管网是给水系统的重要组成部分，净化后的水经过错综复杂的地下管网，达到用户终端。
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