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公开(公告)号：US2539530A
公开(公告)日：1951-01-30
申请号：US55136244
申请日：1944-08-26
Applicant: GEN MOTORS CORP
Inventor： KENDALL CLARK , DIETZ JOHN W , WALLIS HAROLD B
IPC: D06F37/24
CPC classification number: D06F37/24
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