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发明名称
摘要
申请公布号
FR2258646(B3)
申请公布日期
1977.10.14
申请号
FR19750001386
申请日期
1975.01.17
申请人
KARLSTROM JOHAN
发明人
分类号
G03B27/80;(IPC1-7):G03B27/72
主分类号
G03B27/80
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