DIFF Subgroup
C02F 3/32 characterised by the animals or plants used, e.g. algae
Introduced: January 1980
Full Title
Biological treatment of water, waste water, or sewage > characterised by the animals or plants used, e.g. algae
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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