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公开(公告)号：US2083373A
公开(公告)日：1937-06-08
申请号：US5180435
申请日：1935-11-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： HARDESTY JAMES M , LAWSON CLEMENT C
IPC: G01B3/16
CPC classification number: G01B3/166
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