短語詞組短語release poisonous smoke and gas 釋放毒菸毒氣device purifying smoke gas 菸氣淨化裝置converter smoke gas 轉爐菸氣smoke gas treatment 菸氣治理purifying smoke gas 菸氣淨化smoke gas dust removing 菸氣除塵oxygen content of smoke gas 菸氣氧含量circulating technology of smoke gas 菸氣循環(huán)技術exhaust gas smoke cleaner 排氣黑菸濾清器 返回 smoke gas