Before entering the existing stack the flue gas has to be reheated to protect the stack against condensates.For reheating the Gas Gas Heater (GGH) is used.是什么意思_Before entering the existing stack the flue gas has to be reheated to protect the stack against condensates.For reheating the Gas Gas Heater (GGH) is used.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句