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公开(公告)号：US3489998A
公开(公告)日：1970-01-13
申请号：US3489998D
申请日：1965-06-25
Applicant: JAMES C O NEAL , EARL W GOLSON
Inventor： O'NEAL JAMES C , BONE WILFRED O
CPC classification number: B60C23/0469
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