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经营范围
发明名称
Digit indicator.
摘要
申请公布号
GB1181439(A)
申请公布日期
1970.02.18
申请号
GB19670041658
申请日期
1967.09.12
申请人
ERNST & WILHELM BERTRAM
发明人
分类号
G09G3/04
主分类号
G09G3/04
代理机构
代理人
主权项
地址
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