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发明名称
SWIVEL DEVICE FOR BORING, AND BORING METHOD
摘要
申请公布号
JPH0776987(A)
申请公布日期
1995.03.20
申请号
JP19930221281
申请日期
1993.09.06
申请人
FUKUCHIYAMA SAKUSEN:KK
发明人
OUCHI MASAYUKI
分类号
E21B17/05;E21B19/00;(IPC1-7):E21B17/05
主分类号
E21B17/05
代理机构
代理人
主权项
地址
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