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发明名称
摘要
申请公布号
JPS50147580(A)
申请公布日期
1975.11.26
申请号
JP19740056016
申请日期
1974.05.17
申请人
发明人
分类号
G04C3/00;G04G21/08;G04G99/00;H01H36/00;H03K17/96
主分类号
G04C3/00
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