Public transient noncom-munity water systems provide water in places where people do not remain for long peri-ods, such as campgrounds and service stations.
Introduce An Shun's Power plant a Term clotted water depurate equipment's drainage technic change.Change before or anon contrast, sopite design technic existed problem.
By using sulpho acid to dissociate samples, using spectrophotometric method to determine micro-chrome in drainage sedimentary is very easy and simple with low cost.
Abstract The climate of southern area is muggy and wet.It is apt to multiply chironomid larva, which is the polluted insect in the system of supplying water of the city.