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发明名称
Hardfacing composition for rock bits
摘要
申请公布号
GB0225171(D0)
申请公布日期
2002.12.11
申请号
GB20020025171
申请日期
2002.10.29
申请人
SMITH INTERNATIONAL INC
发明人
分类号
E21B10/50
主分类号
E21B10/50
代理机构
代理人
主权项
地址
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