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公开(公告)号：US2868060A
公开(公告)日：1959-01-13
申请号：US41778254
申请日：1954-03-22
Applicant: BECKMAN INSTRUMENTS INC
Inventor： LENNART AKERMAN KARL ARON , ERIK SUNDSTROM KARL
IPC: G01J3/42
CPC classification number: G01J3/42
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