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公开(公告)号：US2943954A
公开(公告)日：1960-07-05
申请号：US71401858
申请日：1958-02-10
Applicant: MEAD CORP
Inventor： ROBINSON JAMES V , SHAFFER IVAN E
IPC: D21G9/00
CPC classification number: D21G9/009
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