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公开(公告)号：US2818733A
公开(公告)日：1958-01-07
申请号：US57963756
申请日：1956-04-20
Applicant: STANDARD OIL CO
Inventor： STANLEY JR WILLIAM E , ERNEST FRUEHAUF
CPC classification number: G01N1/18 , B01L3/0203 , G01N33/28
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