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发明名称
摘要
申请公布号
JPH0318218(U)
申请公布日期
1991.02.22
申请号
JP19890078579U
申请日期
1989.07.03
申请人
发明人
分类号
E01F15/00;E01F15/04;(IPC1-7):E01F15/00
主分类号
E01F15/00
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