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公开(公告)号：US1437212A
公开(公告)日：1922-11-28
申请号：US43390820
申请日：1920-12-29
Applicant: ALLEN ROY N , TODD JOHN N
Inventor： ALLEN ROY N , TODD JOHN N
IPC: B62B3/00
CPC classification number: B62B3/001 , B62B2301/04
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