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发明名称
摘要
申请公布号
JPH0389796(U)
申请公布日期
1991.09.12
申请号
JP19890149474U
申请日期
1989.12.26
申请人
发明人
分类号
E21D11/08;(IPC1-7):E21D11/08
主分类号
E21D11/08
代理机构
代理人
主权项
地址
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