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公开(公告)号：US3298811A
公开(公告)日：1967-01-17
申请号：US27499663
申请日：1963-04-23
Applicant: BELL TELEPHONE LABOR INC
Inventor： KURKJIAN CHARLES R , TREPTOW ARNOLD W
CPC classification number: G02F1/0036 , C03C3/15 , C03C3/16 , C03C3/253 , G01J4/04
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