DIFF Subgroup
F22B 9/02 the boiler body being disposed upright, e.g. above the combustion chamber
Introduced: September 1968
Full Title
Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body > the boiler body being disposed upright, e.g. above the combustion chamber
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
Child Classifications
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