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公开(公告)号：US1793295A
公开(公告)日：1931-02-17
申请号：US32821928
申请日：1928-12-24
Applicant: WICKWIRE SPENCER STEEL COMPANY
Inventor： WERME MELCHER G
IPC: F24F13/075
CPC classification number: F24F13/075
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