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公开(公告)号：US3503511A
公开(公告)日：1970-03-31
申请号：US3503511D
申请日：1967-09-07
Applicant: CARBORUNDUM CO
Inventor： SPITZBERG ALBERT E
CPC classification number: B01D29/114 , B01D29/54 , B01D36/001 , B01D36/003 , B01D2201/40 , B01D2201/4046
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