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公开(公告)号:US3232149A
公开(公告)日:1966-02-01
申请号:US34759864
申请日:1964-02-26
Applicant: RICHARD DAVIDSON DR
Inventor: NORMAND DUCHESNE
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公开(公告)号:US3208317A
公开(公告)日:1965-09-28
申请号:US34679464
申请日:1964-02-24
Applicant: RICHARD DAVIDSON
Inventor: NORMAND DUCHESNE
IPC: B25B17/00
CPC classification number: B25B17/00
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