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发明名称
Einrichtung zur Gesprächszählung in Fernsprechanlagen.
摘要
申请公布号
CH153331(A)
申请公布日期
1932.03.15
申请号
CHD153331
申请日期
1930.06.19
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
ERICSSON TELEFONAKTIEBOLAGET L. M.
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