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公开(公告)号：US2485018A
公开(公告)日：1949-10-18
申请号：US56514144
申请日：1944-11-25
Applicant: ALUMINUM CO OF AMERICA
Inventor： SMITH ARTHUR D
CPC classification number: F27D3/12 , F27D3/0031 , F27D2003/125
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