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发明名称
APPARATUS FOR MAKING AND BREAKING THREADED WELL PIPE CONNECTIONS
摘要
申请公布号
GB2201912(B)
申请公布日期
1991.07.03
申请号
GB19880001320
申请日期
1988.01.21
申请人
* ARMCO INC;* NATIONAL-OILWELL
发明人
MICHAEL C * DINSDALE
分类号
E21B19/16
主分类号
E21B19/16
代理机构
代理人
主权项
地址
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