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发明名称
摘要
申请公布号
BE477644(A)
申请公布日期
1947.11.27
申请号
BE19460477644
申请日期
1946.10.31
申请人
BELL TELEPHONE MANUFACTURING COMPANY
发明人
分类号
H01H37/76;H05B1/02
主分类号
H01H37/76
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