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PCE
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DIFF Subgroup
C22B 3/18

with the aid of microorganisms or enzymes, e.g. bacteria or algae

Introduced: January 1990

Full Title

Extraction of metal compounds from ores or concentrates by wet processes > with the aid of microorganisms or enzymes, e.g. bacteria or algae

No child classifications to compare. This is a leaf node in both IPC and CPC.