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发明名称
DRILL ROD
摘要
申请公布号
JPH09228770(A)
申请公布日期
1997.09.02
申请号
JP19960041301
申请日期
1996.02.28
申请人
MATSUZAWA KIKO:KK
发明人
MATSUZAWA HAJIME
分类号
E21B10/44;(IPC1-7):E21B10/44
主分类号
E21B10/44
代理机构
代理人
主权项
地址
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