风力选 meaning in English

pneumatic preparation

Coarse material is conveyed by a stream of air to variable speed whizzer-separator .
粗料由空气流输送到变速风力选粉机那里。
Analysis for economic benefit of coal preparation technics by wind power in hongmiao mine
红庙矿风力选煤工艺经济效益分析
Application of decentralized dedusting technique in wind - powered coal preparation plant of beizao coal mine
分散式除尘技术在北皂煤矿风力选煤厂中的应用