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发明名称
摘要
申请公布号
JPH0521847(Y2)
申请公布日期
1993.06.04
申请号
JP19890007631U
申请日期
1989.01.27
申请人
发明人
分类号
F16K31/06;H01F7/121;H01F7/16;(IPC1-7):H01F7/16
主分类号
F16K31/06
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代理人
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