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发明名称
摘要
申请公布号
JPS59135929(U)
申请公布日期
1984.09.11
申请号
JP19830024382U
申请日期
1983.02.23
申请人
发明人
分类号
E02D3/10;E21B7/02;E21B10/44;(IPC1-7):E02D3/10
主分类号
E02D3/10
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代理人
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