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发明名称
摘要
申请公布号
FR2137033(A1)
申请公布日期
1972.12.29
申请号
FR19710017074
申请日期
1971.05.11
申请人
LEBLAND ROGER
发明人
分类号
G02C7/16;(IPC1-7):G02C7/00
主分类号
G02C7/16
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