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经营范围
发明名称
Rotary diverter assembly and method.
摘要
申请公布号
GB2469934(A)
申请公布日期
2010.11.03
申请号
GB20100007213
申请日期
2010.04.30
申请人
SMITH INTERNATIONAL, INC.
发明人
DEREK INGRAHAM
分类号
E21B23/00
主分类号
E21B23/00
代理机构
代理人
主权项
地址
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