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公开(公告)号：US3450228A
公开(公告)日：1969-06-17
申请号：US3450228D
申请日：1967-07-19
Applicant: GEN MOTORS CORP
Inventor： WORTMAN DONALD E , NORTON BARRY W , SCHEIBE ELIAS W
CPC classification number: F01L1/245
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