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公开(公告)号：US2855522A
公开(公告)日：1958-10-07
申请号：US35210653
申请日：1953-04-30
Applicant: BAIRD ASSOCIATES INC
Inventor： ROBINSON DAVID Z , DI MATTIA ARTHUR P , MCDANIEL GENE W , COLLETTE RICHARD L
IPC: G02B23/12
CPC classification number: G02B23/12
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