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发明名称
摘要
申请公布号
JPH0313310(U)
申请公布日期
1991.02.12
申请号
JP19890075110U
申请日期
1989.06.26
申请人
发明人
分类号
E01F15/04;E01F9/00;E01F9/015;E01F9/016;E01F9/03;E01F15/00;(IPC1-7):E01F9/00
主分类号
E01F15/04
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