短語詞組短語exploratory tunnel drilling method 勘探坑道掘進(jìn)方法exploratory drilling rig [地質(zhì)]勘探鉆機(jī)advance exploratory drilling 超前鉆探round exploratory drilling 全年勘探鉆井success of detailed exploratory drilling 詳探井鉆探成功率year -round exploratory drilling 全年勘探鉆井success of initial exploratory drilling 預(yù)探井鉆探成功率 返回 exploratory drilling