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公开(公告)号：US2800973A
公开(公告)日：1957-07-30
申请号：US32318052
申请日：1952-11-29
Applicant: GEN MOTORS CORP
Inventor： CARY BEECHER B , MULLER LLOYD E
CPC classification number: F01N1/02 , F01N1/084 , F01N2490/155
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