短语词组短语converter smoke gas 转炉烟气converter coal gas 转炉煤气converter flue gas 转炉烟气converter -gas 转炉煤气cleaning of converter flue gas 转炉烟气净化copper -converter gas 翻译converter gas regeneration 转炉煤气回收converter off -gas 冶炼烟气 返回 converter gas