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发明名称
BORING METHOD THROUGH ABRASIVE JET
摘要
申请公布号
JPH01278685(A)
申请公布日期
1989.11.09
申请号
JP19880102791
申请日期
1988.04.27
申请人
KAJIMA CORP
发明人
YOSHIDA HIROSHI;NISHI KENJI;ISOBE TAKAHISA
分类号
E21B7/18;E21B7/16
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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