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发明名称
摘要
申请公布号
JP2929469(B2)
申请公布日期
1999.08.03
申请号
JP19960206142
申请日期
1996.08.05
申请人
GIKEN SEISAKUSHO KK
发明人
KITAMURA MORIO
分类号
E21B3/00;E21B7/00;(IPC1-7):E21B7/00
主分类号
E21B3/00
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