DIFF Subgroup
E01B 21/02 Special supporting means; Draining of rails
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Track superstructure specially adapted for tramways in paved streets > Special supporting means; Draining of rails
CPC:
Track superstructure adapted for tramways in paved streets (paving E01C9/04, E01C9/06) > Special supporting means; Draining of rails
No child classifications to compare. This is a leaf node in both IPC and CPC.