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公开(公告)号：US2640191A
公开(公告)日：1953-05-26
申请号：US75626447
申请日：1947-06-21
Applicant: INT STANDARD ELECTRIC CORP
Inventor： WILLIAMS EARP CHARLES , FRANCIS CLEAVER RICHARD
IPC: G01S13/84
CPC classification number: G01S13/84
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