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经营范围
发明名称
OPTICAL MASK
摘要
申请公布号
GB8710406(D0)
申请公布日期
1987.06.03
申请号
GB19870010406
申请日期
1987.05.01
申请人
SATCHWELL, G
发明人
分类号
G09F13/06
主分类号
G09F13/06
代理机构
代理人
主权项
地址
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