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公开(公告)号：US3201521A
公开(公告)日：1965-08-17
申请号：US16190561
申请日：1961-12-26
Applicant: BELL TELEPHONE LABOR INC
Inventor： MAYER ARTHUR A , ROBB THEODORE D
IPC: H04M3/14
CPC classification number: H04M3/14
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