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公开(公告)号：US1895683A
公开(公告)日：1933-01-31
申请号：US49333630
申请日：1930-11-04
Applicant: ROTH ERNEST W , PRUTZMAN PAUL W
Inventor： ROTH ERNEST W , PRUTZMAN PAUL W
IPC: B01D11/04
CPC classification number: B01D11/0453 , B01D11/0457
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