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发明名称
摘要
申请公布号
FR2376425(B1)
申请公布日期
1979.04.20
申请号
FR19760039718
申请日期
1976.12.31
申请人
SOCAPEX
发明人
分类号
G02B6/38;(IPC1-7):G02B5/16
主分类号
G02B6/38
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