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发明名称
摘要
申请公布号
JPS5641709(U)
申请公布日期
1981.04.17
申请号
JP19790121088U
申请日期
1979.09.01
申请人
发明人
分类号
E01F7/02;(IPC1-7):E01F7/02
主分类号
E01F7/02
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代理人
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