这种排水系统是最常见的方式，在杭州的实施也已初见成效，它采用了现状管，

This drainage system is the most common way to implement in Hangzhou also has been noticed, which uses a tube current situation, saving a lot of investment, the influence of the laying of sewers in urban road traffic, solving the problem of pollution in rainwater , and easy to implement, a period of time is an economic, efficient and effective way of wastewater collection

This drainage system is the most common way, the implementation in Hangzhou has also begun to bear fruit, it adopts the status quo pipe, saves a lot of investment, eliminates the impact of laying sewage pipe on urban road traffic, solves the pollution problem of the initial rainwater, and is easy to implement, is an economical, fast and effective sewage collection method for a certain period of time.

This kind of drainage system is the most common way, and its implementation in Hangzhou has achieved initial results. It adopts the current pipe, saves a lot of investment, eliminates the impact of laying sewage pipe on urban road traffic, solves the problem of initial rainwater pollution, and is easy to implement. In a certain period of time, it is an economic, fast and effective way of sewage collection