direct-fired type是什么意思

用法例句

This paper is dealt with application of line burner to direct-burning hot-blast furnace of spray dryer in a dyestuff industry company of Hubei province.

论述了以线形燃烧器为核心的直燃式热风装置在湖北某染料化工企业喷雾干燥塔上的应用情况,并着重对线形燃烧器直燃式热风装置、蒸汽锅炉热风装置和电加热热风装置的能耗作了对比。