CPC Subgroup
F22B 13/145 Full Title
Steam boilers of fire-box type, i.e. boilers where both combustion chambers and subsequent flues or fire tubes are arranged within the boiler body > Component parts thereof; Accessories therefor
F22B 13/145 Steam boilers of fire-box type, i.e. boilers where both combustion chambers and subsequent flues or fire tubes are arranged within the boiler body > Component parts thereof; Accessories therefor