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发明名称
摘要
申请公布号
JPS53644(B1)
申请公布日期
1978.01.11
申请号
JP19720020661
申请日期
1972.03.01
申请人
发明人
分类号
H04M3/56;G21F9/28;H04M3/00;H04M3/42;H04N7/00;H04N7/15
主分类号
H04M3/56
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