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发明名称
Improvements in and relating to electric control systems for well drilling plant
摘要
申请公布号
GB419609(A)
申请公布日期
1934.11.15
申请号
GB19330014434
申请日期
1933.05.18
申请人
THE BRITISH THOMSON-HOUSTON COMPANY LIMITED
发明人
分类号
E21B19/08
主分类号
E21B19/08
代理机构
代理人
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地址
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