balance between tunneling and mining in coal pits是什么意思、英文翻译及中文解释

balance between tunneling and mining in coal pits

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词语： balance between tunneling and mining in coal pits

解释： 采掘比例关系

词典： 商务专业英汉词典

balance between tunneling and mining in coal pits 相关解释

采掘比例关系 balance between tunneling and mining (in coal pits);ratiobetween cutting and tunneling

采掘比例关系 balance between tunneling and mining (in coal pits);ratiobetween cutting and tunneling