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公开(公告)号：US1868869A
公开(公告)日：1932-07-26
申请号：US32258928
申请日：1928-11-28
Applicant: ALUMINUM CO OF AMERICA
Inventor： BARNITT JESSE B
IPC: B01D53/26
CPC classification number: B01D53/26 , Y10S502/501
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