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发明名称
KELLY BAR
摘要
申请公布号
JPH04368593(A)
申请公布日期
1992.12.21
申请号
JP19910171813
申请日期
1991.06.18
申请人
HITACHI CONSTR MACH CO LTD
发明人
KUSUMI HIROSHI
分类号
E21B17/07
主分类号
E21B17/07
代理机构
代理人
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地址
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