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公开(公告)号：US2651740A
公开(公告)日：1953-09-08
申请号：US24899951
申请日：1951-09-29
Applicant: FED TELECOMM LAB INC
Inventor： LAIR JULIEN J B
IPC: H03K29/00
CPC classification number: H03K29/00
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