DIFF Subgroup Additional Only
H03B 2201/01 Varying the frequency of the oscillations by manual means
Full Title
Aspects of oscillators relating to varying the frequency of the oscillations > Varying the frequency of the oscillations by manual means
Of 4 combined children, 0 exist in both systems.
4 codes are CPC-only extensions.
Note: 4 CPC extensions are marked as secondary classification only.