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公开(公告)号：US2249833A
公开(公告)日：1941-07-22
申请号：US32078240
申请日：1940-02-26
Applicant: JUR AMSCO CORP DE
Inventor： MAXWELL JAMES
CPC classification number: G01J1/04 , G01J1/0204 , G01J1/0233 , G01J1/0271 , G01J1/06 , G01J1/4228
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