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公开(公告)号：US2739586A
公开(公告)日：1956-03-27
申请号：US42310354
申请日：1954-04-14
Applicant: KARL PREIS OSCAR
Inventor： KARL PREIS OSCAR
IPC: A61H9/00
CPC classification number: A61H9/005 , A61H9/0071 , A61H2201/0207 , A61H2201/0228 , A61H2201/025
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