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)

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