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公开(公告)号：US3160015A
公开(公告)日：1964-12-08
申请号：US12088661
申请日：1961-06-22
Applicant: BECKMAN INSTRUMENTS INC
Inventor： CHARLTON KYLE W , MAXWELL CHARLES T , SPRACKLEN STANFORD B
IPC: G01N30/20
CPC classification number: G01N30/20 , Y10T137/86702
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