短語詞組短語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 下向膠結充填法Cut -and-fill mining method 上向分層充填采礦法 返回 cut and fill mining