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发明名称
Vorrichtung zur Messung der Drehzahlabweichung von Telegrafensendern
摘要
申请公布号
DE706024(C)
申请公布日期
1941.05.16
申请号
DE1939S138185D
申请日期
1939.08.06
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
KORSTEN WILHELM
分类号
H04L12/26
主分类号
H04L12/26
代理机构
代理人
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地址
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