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发明名称
摘要
申请公布号
JPS57133051(U)
申请公布日期
1982.08.19
申请号
JP19810018658U
申请日期
1981.02.12
申请人
发明人
分类号
G03G15/09;H01F7/02;(IPC1-7):G03G15/09
主分类号
G03G15/09
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代理人
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