-
公开(公告)号:US2217306A
公开(公告)日:1940-10-08
申请号:US20425338
申请日:1938-04-25
CPC分类号: B65H39/16 , B31F5/04 , B65H2301/4695 , Y10T156/14 , Y10T156/172
公开(公告)号:US2217306A
公开(公告)日:1940-10-08
申请号:US20425338
申请日:1938-04-25
CPC分类号: B65H39/16 , B31F5/04 , B65H2301/4695 , Y10T156/14 , Y10T156/172