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我公司松树脚矿在推广平巷机械化作业线中,为提高生产效率,改善劳动条件,针对坑内涌水多、影响爆破效果的问题,学习外地经验,试制了
In order to improve the production efficiency and improve the working conditions, the pine foot mine of our company, in promoting the mechanized operation of the drift lane, trialled the foreign experience in response to the problem of gushing water in the pit and affecting the blasting effect