CPC Subgroup
F22B 37/64 Mounting of, or supporting arrangements for, tube units
Full Title
Component parts or details of steam boilers > specially adapted for steam boilers of forced-flow type > Mounting of, or supporting arrangements for, tube units
3 direct subcodes
Child Classifications
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- F22B 37/66 involving vertically-disposed water tubes
- F22B 37/68 involving horizontally-disposed water tubes