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发明名称
摘要
申请公布号
JPH01150698(U)
申请公布日期
1989.10.18
申请号
JP19880044753U
申请日期
1988.04.04
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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