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发明名称
摘要
申请公布号
JPS5518179(U)
申请公布日期
1980.02.05
申请号
JP19780101695U
申请日期
1978.07.24
申请人
发明人
分类号
G04B19/30;G04B39/00;(IPC1-7):G04B19/30
主分类号
G04B19/30
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