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发明名称
BORING DEVICE
摘要
申请公布号
JPH06323077(A)
申请公布日期
1994.11.22
申请号
JP19930132976
申请日期
1993.05.10
申请人
KUWAHATA KAZUMA
发明人
KUWAHATA KAZUMA
分类号
E21B15/00;E21B3/02;E21B3/035;E21B19/06;(IPC1-7):E21B3/02
主分类号
E21B15/00
代理机构
代理人
主权项
地址
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