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公开(公告)号：US2641710A
公开(公告)日：1953-06-09
申请号：US21352851
申请日：1951-03-02
Applicant: SHELL DEV
Inventor： POMPEO DOMENICK J , OTVOS JOHN W
IPC: G01N27/66
CPC classification number: G01N27/66
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