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发明名称
PROMPTING APPARATUS
摘要
申请公布号
GB1572151(A)
申请公布日期
1980.07.23
申请号
GB19750033621
申请日期
1976.11.12
申请人
KINGSBURY J
发明人
分类号
H04N1/00;H04N1/10;H04N5/222;(IPC1-7):H04N7/18;G02B27/00
主分类号
H04N1/00
代理机构
代理人
主权项
地址
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