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发明名称
MECHANICAL DISPLAY DEVICE
摘要
申请公布号
GB8721971(D0)
申请公布日期
1987.10.28
申请号
GB19870021971
申请日期
1987.09.18
申请人
WELDON, B K
发明人
分类号
主分类号
代理机构
代理人
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