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公开(公告)号：US2678675A
公开(公告)日：1954-05-18
申请号：US29335852
申请日：1952-06-13
Applicant: CROWDER WILBERT L
Inventor： CROWDER WILBERT L
IPC: B60C7/10
CPC classification number: B60C7/105 , Y10T152/10405 , Y10T152/10423 , Y10T152/10432
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