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公开(公告)号：US3228097A
公开(公告)日：1966-01-11
申请号：US35674664
申请日：1964-04-02
Applicant: H P SNYDER MFG COMPANY INC
Inventor： TUCKER LEONARD L
CPC classification number: B21D53/30 , B60B21/062 , B60B21/104 , Y10T29/49531
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