烟煤bitumastic coal;gas coal详细»
烟煤bituminous coal详细»
烟煤〔名词〕bituminous coal详细»
烟煤bitumenite;bituminous coal;bitumite;black coal;boghead;boghead coal;bright coal;gascoal;soft coal;splinter coal;splintercoal详细»
烟煤〔名词〕bituminous coal,bituminous-coal详细»
烟煤bitumastic coal bituminite bituminous coal bitumite black coal pitch coal soft coal splinter-详细»
烟煤bituminous coal;gas coal;soft coal详细»