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公开(公告)号：US1384805A
公开(公告)日：1921-07-19
申请号：US36345820
申请日：1920-03-05
Applicant: FRANCIS R MULLIN
Inventor： MCSWINEY DANIEL J
CPC classification number: B01F3/0853 , B01F3/0807 , B01F7/00
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