DIFF Subgroup
F16F 1/3713 Full Title
Springs (working with fluid F16F5/00, F16F9/00) > made of rubber or other material having high internal friction, > characterised by inserts or auxiliary extension elements, e.g. for rigidification (F16F1/387 takes precedence; )
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.