DIFF Subgroup
F16J 15/0818 Full Title
Sealings > between relatively-stationary surfaces (F16J15/46, F16J15/48 take precedence) > with solid packing compressed between sealing surfaces > with exclusively metal packing
Of 8 combined children, 0 exist in both systems.
8 codes are CPC-only extensions.
Note: 7 CPC extensions are marked as secondary classification only.