The coercive abatement of illegal evidence is an important rule in evidential law.

By the analysis of the essential smoke pollution causes during the brass furnace unit production,this paper adopts new pertinence design,strengthens the negative pressure establishment in furnace hearth and maintenance,controls the fume trend,carries out the copper s forced smoke exhaust and distributes the fan flow reasonably,then improves the smoke and dust recovery rate in plant remarkably.

Study on the models for the forced flow-back of fracturing fluid and the backflow of proppant;