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公开(公告)号：US2577615A
公开(公告)日：1951-12-04
申请号：US77262847
申请日：1947-09-08
Applicant: SHELL DEV
Inventor： GARRISON ALBERT H , ROLFSON FRANCIS B
IPC: G01N25/14
CPC classification number: G01N25/14
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