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经营范围
发明名称
WIRELINE VALVES
摘要
申请公布号
GB9003132(D0)
申请公布日期
1990.04.11
申请号
GB19900003132
申请日期
1990.02.12
申请人
MORRELL, TERENCE R
发明人
分类号
E21B33/06;E21B33/072
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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