DIFF Subgroup
H02B 7/08 Underground substations
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Enclosed substations, e.g. compact substations > Distribution substations, e.g. for urban network > Underground substations
CPC:
Enclosed substations, e.g. compact substations > Distribution substations, e.g. for urban network (H02B7/01 takes precedence) > Underground substations
No child classifications to compare. This is a leaf node in both IPC and CPC.