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发明名称
Rock bit
摘要
申请公布号
JPH07197760(K1)
申请公布日期
1995.08.01
申请号
JP19930354145
申请日期
1993.12.28
申请人
TOHO KINZOKU KK;MIKAMI YOSHIICHI
发明人
分类号
E21B10/36;E21C35/18
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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