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公开(公告)号：US2446630A
公开(公告)日：1948-08-10
申请号：US53375444
申请日：1944-05-02
Applicant: BELL TELEPHONE LABOR INC
Inventor： BRYANT NEWTON W , CRUMP ELMO E , DUNGAN MERRILL R , JOHN STRAND
IPC: G01S13/10
CPC classification number: G01S13/103
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