词汇	mast prop
释义	mast prop 桅支撑
随便看	steeplewise steeplifting steepling steeplish steep loess slope steep longwall face steep low seam mining method steeply steeply-dipping steeply dipping anticline steeply dipping coal seam steeply dipping ore-body steeply dipping raise steeply dipping seam steeply dipping seams steeply foreshortened view steeply inclined steeply-inclined Steeply-inclined steeply inclined belt conveyor steeply inclined coal seam steeply inclined coal-seam steeply-inclined coal seam steeply inclined coal seams steeply-inclined narrow vein