短語詞組短語high sulfur bituminous coal 高硫煙煤high volatile bituminous coal 高揮發(fā)性瀝青煤;氣煤;焰煤;長焰煤high rank bituminous coal 高級煙煤high volatile bituminous coal a 氣煤high volatile bituminous coal c 焰煤high volatile bituminous coal b 長焰煤;長焰炭high -volatile A bituminous coal 高揮份A級煙煤 返回 high bituminous coal