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公开(公告)号：US3053074A
公开(公告)日：1962-09-11
申请号：US75344958
申请日：1958-08-06
Applicant: STANDARD OIL CO
Inventor： WALKER DONALD C , GAMBRIL MARVIN D
IPC: G01N25/04
CPC classification number: G01N25/04
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