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发明名称
摘要
申请公布号
FR2050568(A5)
申请公布日期
1971.04.02
申请号
FR19690020242
申请日期
1969.06.20
申请人
FRITZ ANTOINE
发明人
分类号
G03B17/42;(IPC1-7):G03B19/00
主分类号
G03B17/42
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