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公开(公告)号：US2615492A
公开(公告)日：1952-10-28
申请号：US2206848
申请日：1948-04-20
Applicant: IBM
Inventor： HOLMWOOD RICHARD H , HAUCK PAUL A
IPC: B31B1/90
CPC classification number: B31B50/00 , B31B50/8124 , Y10S493/953 , Y10T156/1734
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