preselected stop是什么意思

用法例句

Design and Research of Dedusting in Jingtieshan Ore Preconcentration;

镜铁山矿矿石预选除尘设计及研究

The fine crushing-wet preconcentration and grinding experiment is done on lean magnetite ore from Inner Mongolia area in China.

对内蒙古某贫磁铁矿进行细碎—湿式预选、预选粗精矿细磨后精选的试验研究,结果表明在采用细碎湿式预选抛尾和BKY型预选用磁选设备的情况下,可以实现低品位贫磁铁矿的低成本开发利用。

Optimization of the Pre-concentration Process for Meishan Iron Ore;

梅山铁矿石预选工艺优化研究