... ,rustproof metal pipe,pressing flange and air duct flange.According to the difference of compensator ... for general air duct,compensator for anti-desulfurization,special compensator for ... Of Fabric Compensator 1-6,application for fans,air ducts 7,application air ducts under ... 9-11,for desulfurization 12,application for air duct with high shift Various fabric (non-metal ...