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发明名称
DRILLING DEVICE
摘要
申请公布号
JPH0967993(A)
申请公布日期
1997.03.11
申请号
JP19950245276
申请日期
1995.08.30
申请人
KOKEN BORING MACH CO LTD
发明人
TOYAMA HIROSHI;UNESHIMA HIROSHI
分类号
E21B7/02;(IPC1-7):E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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