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发明名称
摘要
申请公布号
JPS4413889(Y1)
申请公布日期
1969.06.11
申请号
JP19660105690U
申请日期
1966.11.18
申请人
发明人
分类号
G04B33/10;(IPC1-7):G04B33/10
主分类号
G04B33/10
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代理人
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