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摘要
申请公布号
FR880734(A)
申请公布日期
1943.04.02
申请号
FRD880734
申请日期
1941.04.25
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
H04M1/05
主分类号
H04M1/05
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