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公开(公告)号：US3247882A
公开(公告)日：1966-04-26
申请号：US36883864
申请日：1964-05-20
Applicant: ARMSTRONG RUBBER CO
Inventor： RICHARD PRATT ROBERT
CPC classification number: B60C3/00 , B60C29/02 , B60C29/04 , Y10T137/3786
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