... gas expansion method气体膨胀法 gas flame coal长焰炭 gas gangrene气性坏疽 ...
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high volatile bituminous coal
...ile bituminous coal 高挥发性沥青煤 ; 气煤 high volatile bituminous coal b 长焰炭 ; 长焰煤 high volatile bituminous coal a 气煤 ..
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