Environmental disasters are primarypollution source in the coal mine area.
地质灾害是煤矿区环境污染的主要发生源。
2
Therefore, the primarypollution control objective must be point source pollution and diffuse source of domestic wastewater in rural areas.
因此水污染控制必须以点源污染和农村生活面源污染为双重控制目标。
3
Machine set up kiln dust pollutionprimarypollution source of cement plant, to set up this text kiln cement plant dust removal these difficult problem carry on research.