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发明名称
An improved method for the simultaneous transmission of telegraphic and telephonic signals or pictures on submarine cables
摘要
申请公布号
GB368227(A)
申请公布日期
1932.03.03
申请号
GB19300025433
申请日期
1930.08.26
申请人
KARL WILLY WAGNER
发明人
分类号
H04M11/06
主分类号
H04M11/06
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