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公开(公告)号：US3440337A
公开(公告)日：1969-04-22
申请号：US3440337D
申请日：1966-12-28
Applicant: BELL TELEPHONE LABOR INC
Inventor： CREASY FRED K , HORLACHER ROBERT L , LOGAN MASON A , SMITH LARRABEE M , YOUNG WILLIAM RAE JR
CPC classification number: H04L25/242
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