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公开(公告)号：US2770426A
公开(公告)日：1956-11-13
申请号：US29039752
申请日：1952-05-28
Applicant: UNIT MFG COMPANY
Inventor： SIEVERS ELDRED D
IPC: B01D29/00
CPC classification number: B01D29/111 , B01D29/15 , B01D2201/293
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