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发明名称
摘要
申请公布号
JPH0139840(Y2)
申请公布日期
1989.11.29
申请号
JP19830096568U
申请日期
1983.06.24
申请人
发明人
分类号
E21D9/08;E21D9/12;(IPC1-7):E21D9/12
主分类号
E21D9/08
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代理人
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