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发明名称
INNER EXCAVATOR FOR ALL CASING METHOD
摘要
申请公布号
JPH09144463(A)
申请公布日期
1997.06.03
申请号
JP19950300017
申请日期
1995.11.17
申请人
MITSUBISHI HEAVY IND LTD
发明人
KITAMURA YUZO;EGAWA KIKUJI
分类号
E21B4/14;E21B7/20;(IPC1-7):E21B7/20
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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