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发明名称
WELL APPARATUS
摘要
申请公布号
GB9306192(D0)
申请公布日期
1993.05.19
申请号
GB19930006192
申请日期
1993.03.25
申请人
DRIL-QUIP INC
发明人
分类号
E21B33/038;E21B33/043
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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