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公开(公告)号：US3473175A
公开(公告)日：1969-10-21
申请号：US3473175D
申请日：1968-02-14
Applicant: AMERICAN PERMAC INC
Inventor： SIEBER JOHANNES HELMUT
CPC classification number: D06B9/00 , D06C7/02 , D06F43/007 , D06L1/06 , D06M13/522
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