例句 /

The study status of dry classification theory of ultra-fine powder was reviewed, and the trend of ultrafine powder classification was prospected.

The study status of dry classification theory of ultra-fine powder was reviewed, and the trend of ultrafine powder classification was prospected.

摘要综述了超细粉体干法分级的理论研究现状,并对超细粉体分级的发展趋势进行了展望。