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1.发明授权Method and apparatus for removing dents from contoured object by use of reduced pressure above dent combined with tapping forces 失效通过使用凹口上的减压加上攻丝力来消除轮廓物体凹陷的方法和装置
公开(公告)号：US2799318A
公开(公告)日：1957-07-16
申请号：US53072255
申请日：1955-08-26
Applicant: GLENN L MARTIN CO
Inventor： BLUCHER JOHN W , RUBRIGHT KENNARD E , PEELING JOHN E
IPC: B21D1/08
CPC classification number: B21D1/08 , Y10T29/49748 , Y10T29/49805
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