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发明名称
FRESNEL LENS FOR PROJECTION SCREENS
摘要
申请公布号
KR20010093261(A)
申请公布日期
2001.10.27
申请号
KR1020017008897
申请日期
2001.07.13
申请人
发明人
分类号
G03B21/62
主分类号
G03B21/62
代理机构
代理人
主权项
地址
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