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摘要
申请公布号
JPH0547822(Y2)
申请公布日期
1993.12.16
申请号
JP19880106721U
申请日期
1988.08.12
申请人
发明人
分类号
E02F3/24;E02D17/13;E02F5/02;E21B12/06;(IPC1-7):E21B12/06
主分类号
E02F3/24
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