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发明名称
ELECTROMAGNETIC DEVICES
摘要
申请公布号
GB2221796(B)
申请公布日期
1992.01.08
申请号
GB19880018882
申请日期
1988.08.09
申请人
* GEARING & WATSON
发明人
JAMES WALTER * GEARING
分类号
H01F7/06;H04R9/02
主分类号
H01F7/06
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