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发明名称
摘要
申请公布号
JPS473216(U)
申请公布日期
1972.09.04
申请号
JP19710004722U
申请日期
1971.02.01
申请人
发明人
分类号
H01F38/42;H01F19/04;(IPC1-7):H01F19/04
主分类号
H01F38/42
代理机构
代理人
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