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公开(公告)号：US2804157A
公开(公告)日：1957-08-27
申请号：US45006354
申请日：1954-08-16
Applicant: PRESTON DONALD C
Inventor： PRESTON DONALD C
IPC: B60B35/10
CPC classification number: B60B27/0026 , B60B27/065 , B60B35/1027 , B60B35/1081 , B60B35/121 , B60B35/14 , B60B2310/305 , B60B2310/306 , B60Y2200/221
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