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发明名称
摘要
申请公布号
JPS54175328(U)
申请公布日期
1979.12.11
申请号
JP19780073660U
申请日期
1978.05.31
申请人
发明人
分类号
G03B17/20;(IPC1-7):G03B17/20
主分类号
G03B17/20
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