... 现代排雷技术国际会议 international conference on modern demining technology 排雷技术公司 mine-tech 技师；技术专家 technologist ...
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The draft of coal mine excavation plan is typically an unhealthy structural and complex tech economic problem.
矿井采掘计划的编制是典型的不良结构和复杂的技术经济问题。
The Changshan Salt Mine adopted tech nologies of free and inclined style windows opening for brine well repair. It is succeed to use side drilling with windows opening for brine well repair.
四川久大（集团）公司长山盐矿在卤井修治中，采用自由式开窗、导斜开窗两种工艺处理卤井事故，经过多次卤井修治开窗侧钻技术的应用，从而取得了一定的成绩。
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