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发明名称
摘要
申请公布号
JPS63193391(U)
申请公布日期
1988.12.13
申请号
JP19870085579U
申请日期
1987.05.31
申请人
发明人
分类号
G04B23/03;G04C21/16;(IPC1-7):G04B23/03
主分类号
G04B23/03
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代理人
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