This paper discusses on existing problems and reconstruction principles of pipe-line in old urban area and , from the angle of implement, expounds reconstruction forms of pipe-line in old urban area.

就旧城区排水管网存在的问题及改造的原则进行了论述，并从实施的角度阐述了旧城区排水管网改造的形式。

youdao

This paper discusses on existing problems and reconstruction principles of pipe-line in old urban area and , from the angle of implement, expounds reconstruction forms of pipe-line in old urban area.

就旧城区排水管网存在的问题及改造的原则进行了论述，并从实施的角度阐述了旧城区排水管网改造的形式。

youdao