DIFF Subgroup
E01C 9/004 Full Title
Special pavings (specially adapted for playgrounds or sports grounds E01C13/00, for footpaths, sidewalks or cycle tracks E01C15/00); Pavings for special parts of roads or airfields (pavement lights E01C17/00; manholes or like covers or frames E02D29/14)
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.