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发明名称
摘要
申请公布号
FR2479483(B1)
申请公布日期
1984.05.18
申请号
FR19800006613
申请日期
1980.03.25
申请人
SOCAPEX
发明人
分类号
G02B6/38;(IPC1-7):G02B7/26
主分类号
G02B6/38
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