primary grinding unit 第一段磨矿设备
Primary grinding system 一段磨矿系统
Based on the processing flow of Dashihe separation mill, using spiral sluice, the possibility of obtaining final concentrate under coarse primary grinding is searched for.
探索大石河选厂在生产流程的基础上，应用螺旋溜槽，获取粗磨后最终精矿的可能性。
The primary use was elevating water for agriculture, but they were also commonly used to turn millstones for grinding rice and wheat.
最开始主要是应用于农业灌溉，后来渐渐的应用于带动磨石碾米和小麦。
The screening technology is a primary way to insure high yield and super fineness of fine grinding mill. But it is mainly used in the obstructing equipment in the chamber of fine grinding mill.
采用磨内筛分技术是保证高细磨的高产量与高细度的主要技术措施，但主要使用在高细磨各粉磨仓的隔仓装置上。
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