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发明名称
METHOD OF CONTROLLING IMPACT PRESSURE OF DRILLING DEVICE
摘要
申请公布号
JPH1018750(A)
申请公布日期
1998.01.20
申请号
JP19960170347
申请日期
1996.06.28
申请人
FURUKAWA CO LTD
发明人
KANEKO TSUTOMU
分类号
E21B1/38;E21B1/00;E21B1/26;(IPC1-7):E21C3/04
主分类号
E21B1/38
代理机构
代理人
主权项
地址
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