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发明名称
ROTARY DRILL METHOD AND ROTARY DRILL DEVICE
摘要
申请公布号
JPH01287392(A)
申请公布日期
1989.11.20
申请号
JP19880320743
申请日期
1988.12.21
申请人
TAMPELLA AB:OY
发明人
PETSUKA SARUMI
分类号
E21B19/08;E21B3/02;E21B19/086
主分类号
E21B19/08
代理机构
代理人
主权项
地址
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