第五条国家对河道实行按水系统一管理和分级管理相结合的原则。

The state of river water by the implementation of unified management and management levels.

youdao

第五条国家对河道实行按水系统一管理和分级管理相结合的原则。

The state of river water by the implementation of unified management and management levels.

youdao