CPC Subgroup Additional Only
B01D 2201/12 Pleated filters
Full Title
Details relating to filtering apparatus > Pleated filters
3 direct subcodes
Child Classifications
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- B01D 2201/122 with pleats of different length
- B01D 2201/125 with non-parallel pleats
- B01D 2201/127 with means for keeping the spacing between the pleats