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发明名称
摘要
申请公布号
JPS5092271(U)
申请公布日期
1975.08.04
申请号
JP19740002712U
申请日期
1973.12.24
申请人
发明人
分类号
G04B39/02;G04B37/00;G04B39/00;(IPC1-7):G04B39/00
主分类号
G04B39/02
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代理人
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