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发明名称
摘要
申请公布号
JP2508839(Y2)
申请公布日期
1996.08.28
申请号
JP19900017766U
申请日期
1990.02.23
申请人
发明人
分类号
E01B3/48;G08B13/24;(IPC1-7):E01B3/48
主分类号
E01B3/48
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代理人
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