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发明名称
摘要
申请公布号
JPH0247517(Y2)
申请公布日期
1990.12.13
申请号
JP19810129930U
申请日期
1981.09.01
申请人
发明人
分类号
G04C9/04;G04C9/00;G04G21/00;G04G99/00;(IPC1-7):G04C9/04;G04G1/00
主分类号
G04C9/04
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代理人
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