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摘要
申请公布号
SU457059(A1)
申请公布日期
1975.01.15
申请号
SU19711699218
申请日期
1971.09.21
申请人
发明人
分类号
G02B23/06;(IPC1-7):G02B23/06
主分类号
G02B23/06
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