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发明名称
MAKING A MAGNETIC PROPERTY PATTERN VISIBLE TO THE EYE
摘要
申请公布号
GB1602282(A)
申请公布日期
1981.11.11
申请号
GB19770015926
申请日期
1978.05.18
申请人
EMI LTD
发明人
分类号
B42D15/10;G06K19/12;G11B5/70;G11B5/845
主分类号
B42D15/10
代理机构
代理人
主权项
地址
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