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公开(公告)号：US1071811A
公开(公告)日：1913-09-02
申请号：US1913753372
申请日：1913-03-10
Applicant: C B HUIET , JOHN L SHEPPARD JR , SHEPPARD JOHN L
Inventor： SHEPPARD JOHN L
CPC classification number: B21D43/05
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