1)unidirectional working,单向开采2)one-side mining,单翼开采3)reverse direction mining,反向开采4)direction of extraction,开采方向5)taking up,向上开采6)working from bottom up,上向开采
用法例句
Researches have been conducted in regard to the Stubble Repeating relationship at the Fifth and Sixth Seam at the Ping Dingshan Fifth and Sixth Coal Mine and the coal Pressure appear rule during the face mining,and the reverse direction mining method has been set down.
