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发明名称
Nummernschalter fuer Selbstanschlussfernsprechstellen
摘要
申请公布号
DE503348(C)
申请公布日期
1930.07.26
申请号
DE1925B119281D
申请日期
1925.04.10
申请人
HANS BALK
发明人
分类号
H04M1/32
主分类号
H04M1/32
代理机构
代理人
主权项
地址
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