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公开(公告)号：US2681680A
公开(公告)日：1954-06-22
申请号：US12154349
申请日：1949-10-15
Applicant: WILBUR MILLER
Inventor： MILLER JOSEPH C
IPC: B60C11/18
CPC classification number: B60C11/18 , Y10T152/10279
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