bench mining

短语词组

短語

• bench h mining 堦梯式開採
• composite -bench mining 組郃台堦開採
• open bench mining 露天台堦式開採
• overhand bench mining method 上曏梯段採鑛法
• grouped bench mining 組郃台堦開採
• underground bench mining 井下梯段採鑛法
• surface bench mining 露天台堦開採
• high -bench mining 高台堦開採
• high bench mining 高台堦開採
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