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公开(公告)号：US3310720A
公开(公告)日：1967-03-21
申请号：US33569264
申请日：1964-01-03
Applicant: BELL TELEPHONE LABOR INC
Inventor： KING JAMES C , THOMAS NEAL C
CPC classification number: H01G7/026 , H01H57/00 , Y10S423/01 , Y10T29/42
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