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发明名称
摘要
申请公布号
JPS63115791(U)
申请公布日期
1988.07.26
申请号
JP19870007929U
申请日期
1987.01.22
申请人
发明人
分类号
G04B39/02;(IPC1-7):G04B39/02
主分类号
G04B39/02
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代理人
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