友宝二井14层煤建筑物下条带开采法采留宽度尺寸的确定

友宝二井14层煤建筑物下条带开采法采留宽度尺寸的确定的英文翻译

基本释义

• Definition of the mining width of the bench method under buildings at No.14 seam of Youbao Second Well