bench mining

短语词组

短语

• bench h mining 阶梯式开采
• composite -bench mining 组合台阶开采
• open bench mining 露天台阶式开采
• overhand bench mining method 上向梯段采矿法
• grouped bench mining 组合台阶开采
• underground bench mining 井下梯段采矿法
• surface bench mining 露天台阶开采
• high -bench mining 高台阶开采
• high bench mining 高台阶开采
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