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公开(公告)号：US3479731A
公开(公告)日：1969-11-25
申请号：US3479731D
申请日：1967-06-13
Applicant: GEN MOTORS CORP
Inventor： MANTEL EDWARD R , VIGOR CHARLES W , IWANKOVITSCH STEPHEN W
CPC classification number: B23K1/0008 , F28D19/042
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