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发明名称
TWO-WAY COMMUNICATION SYSTEMS.
摘要
申请公布号
IE18227(L)
申请公布日期
1947.11.28
申请号
IE19470000306
申请日期
1947.05.28
申请人
STANDARD TELEPHONES AND CABLES LTD.
发明人
分类号
H04B1/56;(IPC1-7):H04B1/56;H04B7/18
主分类号
H04B1/56
代理机构
代理人
主权项
地址
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