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公开(公告)号：US2270659A
公开(公告)日：1942-01-20
申请号：US33396440
申请日：1940-05-08
Applicant: GAERTNER SCIENT CORP
Inventor： MEYN PAUL F
IPC: A62B9/02
CPC classification number: A62B9/02 , Y10T137/2012 , Y10T137/7793 , Y10T137/7795
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