composite oil-exhaust gas fired boiler 废气燃油组合式锅炉 ; 燃油 ; 废气混合式锅炉

oil fired-exhaust gas boiler 燃油

exhaust gas-oil fired boiler 废气 ; 燃油锅炉

alternatively-fired exhaust gas boiler 废气 ; 燃油交替式锅炉

fired exhaust gas boiler 废气燃油交替式锅炉

oil-fired exhaust gas boiler 燃油废气两用锅炉