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发明名称
摘要
申请公布号
JPS4710839(U)
申请公布日期
1972.10.09
申请号
JP19710013136U
申请日期
1971.03.02
申请人
发明人
分类号
H01F21/06;H01F21/00;(IPC1-7):H01F21/00
主分类号
H01F21/06
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代理人
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