DIFF Subgroup
E04F 17/06 Light shafts, e.g. for cellars
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Vertical ducts; Channels, e.g. for drainage > Light shafts, e.g. for cellars
CPC:
Vertical ducts; Channels, e.g. for drainage (pipes in general F16L; pipe-line systems F17D ) > Light shafts, e.g. for cellars
No child classifications to compare. This is a leaf node in both IPC and CPC.