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公开(公告)号：US2478951A
公开(公告)日：1949-08-16
申请号：US53701744
申请日：1944-05-23
Applicant: CALIFORNIA RESEARCH CORP
Inventor： STOKELY JOHN M , COOK GEORGE M
IPC: G01N21/91
CPC classification number: G01N21/91 , Y10S252/96
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