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发明名称
TELEPHONY
摘要
申请公布号
IE15254(L)
申请公布日期
1939.02.21
申请号
IED15254
申请日期
1938.08.10
申请人
STANDARD TELEPHONES AND CABLES LIMITED
发明人
分类号
(IPC1-7):H0413/42
主分类号
(IPC1-7):H0413/42
代理机构
代理人
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