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发明名称
摘要
申请公布号
FR1555615(A)
申请公布日期
1969.01.31
申请号
FRD1555615
申请日期
1967.09.05
申请人
发明人
分类号
G02B17/00;G02B17/08;G03B27/52
主分类号
G02B17/00
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地址
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