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PCE
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DIFF Subgroup
F24F 8/175

using biological materials, plants or microorganisms

Introduced: January 2021

Full Title

Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying > by separation, e.g. by filtering > using biological materials, plants or microorganisms

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