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发明名称
摘要
申请公布号
JPH0473007(U)
申请公布日期
1992.06.26
申请号
JP19900115360U
申请日期
1990.11.05
申请人
发明人
分类号
E01F7/00;E01D19/08;(IPC1-7):E01F7/00
主分类号
E01F7/00
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