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1.发明授权Communication system having level control means for repeaters connected along a transmission cable 失效具有用于沿着传输电缆连接的中继器的电平控制装置的通信系统
公开(公告)号：US3414688A
公开(公告)日：1968-12-03
申请号：US43164265
申请日：1965-02-10
Applicant: PHILIPS CORP
Inventor： WILLEM HERMES , FREDERICK LANSU JOSEPH , JAN VERHAGEN
IPC: H04B3/10
CPC classification number: H04B3/10
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