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发明名称
PORTABLE VIEWER
摘要
申请公布号
GB8715173(D0)
申请公布日期
1987.08.05
申请号
GB19870015173
申请日期
1987.06.29
申请人
GABAY, H J
发明人
分类号
G09B17/02
主分类号
G09B17/02
代理机构
代理人
主权项
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