DIFF Subgroup Additional Only
F05B 2280/2004 Ceramics; Oxides
Full Title
Materials; Properties thereof > Inorganic materials, e.g. non-metallic materials > Ceramics; Oxides
Of 3 combined children, 0 exist in both systems.
3 codes are CPC-only extensions.
Note: 3 CPC extensions are marked as secondary classification only.