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经营范围
发明名称
ADAPTOR FOR USE IN EXTRACTING ROTARY DRILLING RODS
摘要
申请公布号
GB2494419(A)
申请公布日期
2013.03.13
申请号
GB20110015428
申请日期
2011.09.07
申请人
NATURAL ENVIRONMENT RESEARCH COUNCIL
发明人
HUMPHREY CRAVEN WALLIS
分类号
E21B19/06
主分类号
E21B19/06
代理机构
代理人
主权项
地址
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