CPC Subgroup
F28F 1/42 the means being both outside and inside the tubular element
Full Title
Tubular elements; Assemblies of tubular elements (specially adapted for movement F28F5/00) > Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses (crimped or corrugated elements F28F1/06, F28F1/08) > the means being both outside and inside the tubular element
4 direct subcodes
Child Classifications
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- F28F 1/44 and being formed of wire mesh