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公开(公告)号：US2785217A
公开(公告)日：1957-03-12
申请号：US29603452
申请日：1952-06-27
Applicant: BELL TELEPHONE LABOR INC
Inventor： HARLEY JOSEPH J , HENNEBERGER THOMAS C , WATLING ROBERT G
IPC: H02G1/04
CPC classification number: H02G1/04 , Y10T24/3936
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