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发明名称
摘要
申请公布号
JPS627685(Y2)
申请公布日期
1987.02.23
申请号
JP19800057234U
申请日期
1980.04.25
申请人
发明人
分类号
E01F9/04;E01F9/00;(IPC1-7):E01F9/04
主分类号
E01F9/04
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