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发明名称
摘要
申请公布号
JPS52169336(U)
申请公布日期
1977.12.22
申请号
JP19760077134U
申请日期
1976.06.15
申请人
发明人
分类号
G03B17/56;(IPC1-7):G03B17/56
主分类号
G03B17/56
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