短语词组短語steeply y dipping raise 急傾斜上山steeply dipping raise 急傾斜上山steeply dipping coal seam 大傾角煤層steeply dipping narrow deposits 急傾斜薄鑛躰steeply dipping zone 陡立地層帶steeply dipping bed 斜浸牀steeply dipping seams 大傾角煤層 返回 steeply dipping