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发明名称
摘要
申请公布号
JPS63137888(U)
申请公布日期
1988.09.12
申请号
JP19870030991U
申请日期
1987.03.03
申请人
发明人
分类号
G04B39/00;G04B47/00;(IPC1-7):G04B47/00
主分类号
G04B39/00
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代理人
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