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公开(公告)号：US3144498A
公开(公告)日：1964-08-11
申请号：US9111361
申请日：1961-02-23
Applicant: PERKIN ELMER CORP
Inventor： ALPERT NELSON L , MARSHALL HAMILTON W
CPC classification number: G01J3/32 , G01J3/06 , G01J3/18 , Y10T74/2101
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