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发明名称
Novel hardmetal for use in oil and gas drilling applications
摘要
申请公布号
GB2476887(A)
申请公布日期
2011.07.13
申请号
GB20110002653
申请日期
2009.09.18
申请人
SMITH INTERNATIONAL, INC.
发明人
MADAPUSI K KESHAVAN;DAH-BEN LIANG
分类号
E21B10/56;C22C29/00;C23C16/34;C23C16/40;C23C16/455;C23C30/00;E21B10/46
主分类号
E21B10/56
代理机构
代理人
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地址
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