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公开(公告)号：US2577108A
公开(公告)日：1951-12-04
申请号：US66121246
申请日：1946-04-11
Applicant: BELL TELEPHONE LABOR INC
Inventor： COYNE HOWARD L , FESSLER FRANK D , HAMPTON LEON N , MESCH ORWAR S A , THOMPSON WALTER N
IPC: H01C10/32
CPC classification number: H01C10/32
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