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发明名称
摘要
申请公布号
JPS55157233(U)
申请公布日期
1980.11.12
申请号
JP19790056675U
申请日期
1979.04.27
申请人
发明人
分类号
G03B17/18;G02B7/00;G02B7/02;(IPC1-7):G03B17/18
主分类号
G03B17/18
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代理人
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