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发明名称
摘要
申请公布号
JPS57147314(U)
申请公布日期
1982.09.16
申请号
JP19810031150U
申请日期
1981.03.05
申请人
发明人
分类号
E01F9/00;E01F9/018;(IPC1-7):E01F9/01
主分类号
E01F9/00
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代理人
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