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发明名称
摘要
申请公布号
JPH0262996(U)
申请公布日期
1990.05.10
申请号
JP19880139447U
申请日期
1988.10.26
申请人
发明人
分类号
E21D9/06;E21D11/10;(IPC1-7):E21D9/06
主分类号
E21D9/06
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代理人
主权项
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