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经营范围
发明名称
Couplage de conférence pour télégraphie
摘要
申请公布号
FR718050(A)
申请公布日期
1932.01.18
申请号
FRD718050
申请日期
1931.06.02
申请人
SIEMENS & HALSKE AKTIEN-GESELLSCHAFT
发明人
分类号
H04L12/18
主分类号
H04L12/18
代理机构
代理人
主权项
地址
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