【机械工程】烟道气净化，表面

flue-gas header box, flue

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

surface, flue-gas swept

flue-gas cleaning, catalytic

tube, flue-gas swept

flue-gas circulation

flue-gas cleaning