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公开(公告)号：US2794656A
公开(公告)日：1957-06-04
申请号：US39946853
申请日：1953-12-21
Applicant: WEST MICHIGAN STEEL FOUNDRY CO
Inventor： SEYFERTH DONALD F
IPC: B62D53/08
CPC classification number: B62D53/0835
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