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公开(公告)号：US2226870A
公开(公告)日：1940-12-31
申请号：US17357137
申请日：1937-11-09
Applicant: VULCAN MFG CO INC
Inventor： JAMES MCDEVITT HARRY
IPC: B01D41/02
CPC classification number: B01D41/02 , B01D24/4884 , B01D35/16 , B01D2201/087
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