| 释义 |
medium length hole
基本例句
中深孔
Test Research on Parameter Optimization for Long and Medium Hole Drilling and Blasting in Sanxin Co.三鑫公司中深孔凿岩爆破参数优化与试验研究。
As a result,the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly,then stoping ore pillar bymedium length holecaving method.后沟金矿采用平底结构浅孔留矿法先采矿房，后用中深孔崩落法回采矿柱，经两年多的生产实践，取得较好的技术经济指标。 |