DIFF Subgroup Additional Only
B31B 2170/20 having multi-layered walls, e.g. laminated or lined
Full Title
Construction of flexible containers > having multi-layered walls, e.g. laminated or lined
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Note: 2 CPC extensions are marked as secondary classification only.