港口大型煤堆场  Large Coal Yard of Port

粉煤灰堆场  coal ash site

煤矸石堆场  Gangue stacking

7种煤煤质  coal quality of seven coal samples

采煤场  coal face

储煤场  stockyard

传统条形煤场  conventional oblong coal yard

堆煤自预压  self-preloading

方形全封闭煤场  totally enclosed quadrate coal yard

废煤堆  culm and gob banks

封闭式圆形煤场  the enclosed circular coal yard

锅炉房煤场  coal yard of boiler house

褐煤煤焦  lignite char

褐煤煤气  lignite gas

井筒与工业广场煤柱  Shaft and Industry Square Pillar

垃圾场煤气  landfill gas

垃圾场煤气发动机简图  landfill engine schematic

炼焦煤煤泥  coking coal slime

露天煤场  Open-pit Coal