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发明名称
摘要
申请公布号
BE739286(A)
申请公布日期
1970.03.24
申请号
BED739286
申请日期
1969.09.24
申请人
发明人
分类号
H04J3/00;H04B7/15;H04B7/185;H04B7/212
主分类号
H04J3/00
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代理人
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