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公开(公告)号：US1784445A
公开(公告)日：1930-12-09
申请号：US3474325
申请日：1925-06-03
Applicant: BUDD WHEEL CO
Inventor： WILLIAM HUGHES JAMES
IPC: B21D53/26
CPC classification number: B21D53/26 , Y10T29/49501 , Y10T29/534 , Y10T29/53448
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