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发明名称
MAGNETIC PROPERTY MODIFICATION
摘要
申请公布号
GB9022318(D0)
申请公布日期
1990.11.28
申请号
GB19900022318
申请日期
1990.10.15
申请人
ESSELTE METO INTERNATIONAL PRODUKTIONS GMBH
发明人
分类号
G08B13/24;H01F10/12;H01F10/13;H01F41/14;H01F41/34
主分类号
G08B13/24
代理机构
代理人
主权项
地址
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