Watersupply and drainage engineering is sorted out engineering discipline, and it is a field of intercross multi-discipline.

摘给水排水工程为工程学科类，是多学科互相交叉形成的一学科。

Water supply corporations is feazed by redwater even blackwater, users rebel for that, they even have suspicious with the watersupply corporations.

红水、黑水现象经常困扰各城市的供水企业，对此用户十，甚至对自来水的信誉产生了质疑。