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公开(公告)号：US2583088A
公开(公告)日：1952-01-22
申请号：US18463250
申请日：1950-09-13
Applicant: BELL TELEPHONE LABOR INC
Inventor： CLUTTS CHARLES E , PULLIS GEORGE A , SCHENCK ALFRED K , WEBER LAURENCE A
IPC: G08B25/01
CPC classification number: G08B25/014
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