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发明名称
Retractable ball seat having a time delay material
摘要
申请公布号
AU2007297417(A1)
申请公布日期
2008.03.27
申请号
AU20070297417
申请日期
2007.09.14
申请人
BAKER HUGHES INCORPORATED
发明人
YANG XU
分类号
E21B33/00
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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