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公开(公告)号：US2459821A
公开(公告)日：1949-01-25
申请号：US51214443
申请日：1943-11-29
Applicant: INT STANDARD ELECTRIC CORP
Inventor： LADISLAS KOZMA , LENS GEORGES X
IPC: H04L17/26
CPC classification number: H04L17/26
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