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公开(公告)号:US3097652A
公开(公告)日:1963-07-16
申请号:US83785559
申请日:1959-09-03
Applicant: LOOSE LEAF METALS COMPANY
Inventor: JOSEPH VILLHARD GEORGE
公开(公告)号:US3097652A
公开(公告)日:1963-07-16
申请号:US83785559
申请日:1959-09-03
Applicant: LOOSE LEAF METALS COMPANY
Inventor: JOSEPH VILLHARD GEORGE