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发明名称
Selbsttätige Fernsprechanlage.
摘要
申请公布号
CH143853(A)
申请公布日期
1930.11.30
申请号
CHD143853
申请日期
1929.05.13
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
ERICSSON TELEFONAKTIEBOLAGET L. M.
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主分类号
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