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发明名称
摘要
申请公布号
SU558243(A1)
申请公布日期
1977.05.15
申请号
SU19762322937
申请日期
1976.02.11
申请人
发明人
分类号
G02B5/30;(IPC1-7):G02B5/30
主分类号
G02B5/30
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代理人
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