CPC Main Group
B01D 37/00 Processes of filtration (processes specially adapted for filtering gases B01D46/00)
3 direct subcodes
Child Classifications
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- B01D 37/02 Precoating the filter medium; Addition of filter aids to the liquid being filtered
- B01D 37/03 using flocculating agents
- B01D 37/04 Controlling the filtration