coarse ore meaning in English

粗矿石
块矿

A summary introduction is made of the electrovibrating ore - drawing techniques that have been used in shizishan copper mine , which includes the electrovibrating ore drawing of the ore pass in middle section , the one for in - stope ore drawing , the one for the main underground ore bin and the one for the coarse ore bin in the concentrator
针对狮子山铜矿应用中的几种电振动放矿技术进行了总结性介绍，它们分别是：中段溜井电振动放矿、采场内电振动放矿、坑下主矿仓电振动放矿、选矿厂粗矿仓电振动放矿。