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公开(公告)号：US3405992A
公开(公告)日：1968-10-15
申请号：US41019364
申请日：1964-11-10
Applicant: BELL TELEPHONE LABOR INC
Inventor： HUTSON ANDREW R , SAUL MEIBOOM
IPC: G02B6/10
CPC classification number: G02B6/10
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