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经营范围
发明名称
UNDERWATER WELLHEAD CONNECTOR
摘要
申请公布号
GB8411419(D0)
申请公布日期
1984.06.06
申请号
GB19840011419
申请日期
1984.05.03
申请人
NL INDUSTRIES INC
发明人
分类号
E21B33/035;E21B33/038;E21B43/01;E21B43/013;(IPC1-7):B32B27/12
主分类号
E21B33/035
代理机构
代理人
主权项
地址
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