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发明名称
Disposition de montage pour tenir des conversations de conférence
摘要
申请公布号
FR682630(A)
申请公布日期
1930.05.30
申请号
FRD682630
申请日期
1929.10.02
申请人
SIEMENS & HALSKE AKTIEN-GESELLSCHAFT
发明人
分类号
H04M3/56
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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