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摘要
申请公布号
DE2009091(A1)
申请公布日期
1970.09.10
申请号
DE19702009091
申请日期
1970.02.26
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发明人
分类号
G03B7/083;(IPC1-7):G03B7/08
主分类号
G03B7/083
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