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发明名称
摘要
申请公布号
JPS5234886(B1)
申请公布日期
1977.09.06
申请号
JP19710019083
申请日期
1971.03.31
申请人
发明人
分类号
H04H20/89;(IPC1-7):H04H5/00;H04H1/00
主分类号
H04H20/89
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