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发明名称
摘要
申请公布号
JPS4823034(U)
申请公布日期
1973.03.16
申请号
JP19710065184U
申请日期
1971.07.24
申请人
发明人
分类号
G03B17/38;(IPC1-7):G03B17/38
主分类号
G03B17/38
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