1) Two-stage stoping
两步采矿
2) twostepback mining
两步回采
3) Two stage mining
两步开采
4) Two step mining
两步骤回采
5) Hydro-metallurgy two ore method
湿法两矿一步法
1.
Hydro-metallurgy two ore method is put forward to deal with a pyrogenic process copper factory's cleaning residue.
为处理某火法炼铜厂的洗净残渣,提出了湿法两矿一步法。
6) One step mining of ore block
矿块一步骤回采
补充资料：三步两脚
1.快速行走貌。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条