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发明名称
Isolation valve
摘要
申请公布号
GB0120258(D0)
申请公布日期
2001.10.10
申请号
GB20010020258
申请日期
2001.08.21
申请人
SCHLUMBERGER HOLDINGS LIMITED
发明人
分类号
E21B33/035;E21B34/10
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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