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发明名称
摘要
申请公布号
JPH0543438(Y2)
申请公布日期
1993.11.01
申请号
JP19870107703U
申请日期
1987.07.14
申请人
发明人
分类号
G04B21/08;G04B37/18;G04B45/00;(IPC1-7):G04B45/00
主分类号
G04B21/08
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