排烟脱硫石膏

flue gas

rich gas heating with flue gas rarefaction in coke ovens

cement from flue dust

flue gas desulphurisation

blast pipe【环境】 铁路;exhaust pipe【环境】 铁路;flue-gas leading【环境】 铁路

cleaning the flue-gas swept surface, flue-gas swept tubes of steam boilers

flue gas cooler

smoke duct (smoke flue)