ore withdrawal的用法和样例：
例句
- Based on the technical and economical index, an optimal decision for the cutoff grade of ore drawing is presented.
在获取矿石技术经济指标的基础上，对截止放矿品位进行了优选政策。 - Taking Jingtieshan Mine as an example,the peper deals with several problems with applying non-dilution ore drawing mw thod.
以镜铁山矿为例研究了无贫化放矿方式在矿山应用的若干问题。
