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公开(公告)号：US3230993A
公开(公告)日：1966-01-25
申请号：US37952864
申请日：1964-07-01
Applicant: SMITH
Inventor： SMITH KENNETH H , ANDREW JOHN T
IPC: B42D3/04
CPC classification number: B42D3/04 , B42P2201/00 , Y10S428/913
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