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发明名称
摘要
申请公布号
JPS5838814(U)
申请公布日期
1983.03.14
申请号
JP19810132518U
申请日期
1981.09.04
申请人
发明人
分类号
E01F13/00;E01F13/04;(IPC1-7):E01F13/00
主分类号
E01F13/00
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代理人
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