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PCE
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DIFF Subgroup
F22B 7/14

with both auxiliary water tubes and auxiliary fire tubes

Introduced: September 1968

Full Title

Steam boilers of furnace-tube type, i.e. the combustion of fuel being performed inside one or more furnace tubes built-in in the boiler body > with both auxiliary water tubes and auxiliary fire tubes

No child classifications to compare. This is a leaf node in both IPC and CPC.