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发明名称
Oil well valve operation
摘要
申请公布号
GB0215561(D0)
申请公布日期
2002.08.14
申请号
GB20020015561
申请日期
2002.07.05
申请人
ACCENTUS PLC
发明人
分类号
主分类号
代理机构
代理人
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