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公开(公告)号：US3460207A
公开(公告)日：1969-08-12
申请号：US3460207D
申请日：1967-07-03
Applicant: ANDY C STEWART
Inventor： STEWART ANDY C
CPC classification number: A63B60/62 , Y10T24/318 , Y10T24/3492
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