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B01D 2239/065
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data.epo.org/linked-data/def/cpc/B01D2239-065
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Patent classification
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Child Classification
B01D 2239/0668
B01D 2239/0686
B01D 2239/0681
B01D 2239/0677
B01D 2239/0672
B01D 2239/0663
B01D 2239/0659
B01D 2239/0654
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Cooperative Patent Classification
Parent Classification
B01D 2239/06
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