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发明名称
摘要
申请公布号
JP2672888(B2)
申请公布日期
1997.11.05
申请号
JP19900293716
申请日期
1990.11.01
申请人
发明人
分类号
E21D11/40;(IPC1-7):E21D11/40
主分类号
E21D11/40
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代理人
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地址
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