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发明名称
摘要
申请公布号
NL7109038(A)
申请公布日期
1972.01.03
申请号
NL19710009038
申请日期
1971.06.30
申请人
发明人
分类号
G03B15/04;(IPC1-7):G03B15/03
主分类号
G03B15/04
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代理人
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地址
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