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公开(公告)号：US1069919A
公开(公告)日：1913-08-12
申请号：US1909501489
申请日：1909-06-11
Applicant: CHANCELLOR LEONIDAS M , CHANCELLOR SULLIVAN D
Inventor： CHANCELLOR LEONIDAS M , CHANCELLOR SULLIVAN D
CPC classification number: B21J13/02 , B21D37/02 , Y10T29/49529
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