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发明名称
摘要
申请公布号
JP2537874(Y2)
申请公布日期
1997.06.04
申请号
JP19880118798U
申请日期
1988.09.12
申请人
发明人
分类号
E21D11/00;(IPC1-7):E21D11/00
主分类号
E21D11/00
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代理人
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地址
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