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： 贸易专业英汉词典

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