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发明名称
摘要
申请公布号
JPH0310287(U)
申请公布日期
1991.01.31
申请号
JP19890069791U
申请日期
1989.06.16
申请人
发明人
分类号
E02D1/02;E21B47/12;G01B11/24;G01V3/18;G02B23/24;(IPC1-7):G01V3/18
主分类号
E02D1/02
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代理人
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