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发明名称
摘要
申请公布号
JPS4871348(U)
申请公布日期
1973.09.07
申请号
JP19710117217U
申请日期
1971.12.13
申请人
发明人
分类号
H01F21/00;H01F21/06;H03J5/30;H04N5/44;(IPC1-7):H01F21/00
主分类号
H01F21/00
代理机构
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