DIFF Subgroup
A62B 23/04 for gasproof shelters
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Filters for breathing-protection purposes > for gasproof shelters
CPC:
Filters for breathing-protection purposes (gas-filters in general B01D) > for gasproof shelters
No child classifications to compare. This is a leaf node in both IPC and CPC.