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发明名称
摘要
申请公布号
JPH0254898(U)
申请公布日期
1990.04.20
申请号
JP19880170480U
申请日期
1988.12.29
申请人
发明人
分类号
E21D11/08;E04B1/38;E04B1/61;(IPC1-7):E21D11/08;E04B1/60
主分类号
E21D11/08
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