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发明名称
摘要
申请公布号
JPS5569766(U)
申请公布日期
1980.05.14
申请号
JP19780153932U
申请日期
1978.11.08
申请人
发明人
分类号
G04B37/04;(IPC1-7):G04B37/04
主分类号
G04B37/04
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