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发明名称
AN IMPROVED GRATING WRITING SYSTEM
摘要
申请公布号
KR20010053083(A)
申请公布日期
2001.06.25
申请号
KR1020007014563
申请日期
2000.12.21
申请人
发明人
分类号
G02B5/20
主分类号
G02B5/20
代理机构
代理人
主权项
地址
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