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公开(公告)号：US2897367A
公开(公告)日：1959-07-28
申请号：US58058356
申请日：1956-04-25
Applicant: APPLIED RES LAB INC
Inventor： GEORGE ANDERMANN , WESLEY KEMP JOSEPH
IPC: G01N23/207
CPC classification number: G01N23/2076
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