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公开(公告)号：US1688691A
公开(公告)日：1928-10-23
申请号：US55864322
申请日：1922-05-05
Applicant: SPERRY DEV CO
Inventor： DRAKE HARCOURT C , SPERRY ELMER A
IPC: B60L11/04
CPC classification number: B60L11/04 , Y02T10/70 , Y02T10/7077
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