cut and fill mining
短語(yǔ)詞組
- horizontal cut and fill mining 水平分層充填采礦法
- horizontal cut -and-fill mining 水平分層充填采礦法
- upward cut -and-fill mining 上向分層采礦
- downward cut -and-fill mining 下向膠結(jié)充填法
- Cut -and-fill mining method 上向分層充填采礦法 返回 cut and fill mining