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公开(公告)号:US2934991A
公开(公告)日:1960-05-03
申请号:US70927658
申请日:1958-01-16
Applicant: MANDREL INDUSTRIES
Inventor: CLOUD RAYMOND T
公开(公告)号:US2934991A
公开(公告)日:1960-05-03
申请号:US70927658
申请日:1958-01-16
Applicant: MANDREL INDUSTRIES
Inventor: CLOUD RAYMOND T