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公开(公告)号：US1894372A
公开(公告)日：1933-01-17
申请号：US52515831
申请日：1931-03-25
Applicant: FLECK PAUL C , FLECK HARRY M
Inventor： FLECK PAUL C , FLECK HARRY M
IPC: B60C23/00
CPC classification number: B60C23/0496 , Y10T137/3662
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