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发明名称
摘要
申请公布号
JPS6414295(U)
申请公布日期
1989.01.25
申请号
JP19870107231U
申请日期
1987.07.13
申请人
发明人
分类号
E21D9/08;E21D9/12;(IPC1-7):E21D9/08
主分类号
E21D9/08
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