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公开(公告)号：US3474502A
公开(公告)日：1969-10-28
申请号：US3474502D
申请日：1967-05-16
Applicant: FREUDENBERG CARL
Inventor： POHLAND ALOIS
CPC classification number: D04H1/736 , B23Q3/00 , B23Q2701/01 , B23Q2703/00 , C07D201/04 , D04H1/74 , D04H18/02
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