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发明名称
CONNECTION DEVICE OF GROUND-EXCAVATING ROD
摘要
申请公布号
JPH11223083(A)
申请公布日期
1999.08.17
申请号
JP19980027290
申请日期
1998.02.09
申请人
DAISHO SHINKI KK
发明人
KUROKI MASAHIRO
分类号
E21B19/16;E02D3/12;(IPC1-7):E21B19/16
主分类号
E21B19/16
代理机构
代理人
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地址
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