DIFF Subgroup
F22B 27/08 bent helically, i.e. coiled
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Instantaneous or flash steam boilers > built-up from water tubes > bent helically, i.e. coiled
CPC:
Instantaneous or flash steam boilers > built-up from water tubes (F22B27/12 - F22B27/16 take precedence) > bent helically, i.e. coiled
No child classifications to compare. This is a leaf node in both IPC and CPC.