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11.Method and means for perforating and exposing webs of film and paper 失效
Title translation: 用于执行和曝光电影和纸张的方法和手段公开(公告)号:US3466128A
公开(公告)日:1969-09-09
申请号:US3466128D
申请日:1965-12-16
Applicant: KAHLE ENG CO
Inventor: NAPOR CARL A , ENGEL WILLIAM T