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经营范围
发明名称
Drill pipe coupling
摘要
申请公布号
GB864606(A)
申请公布日期
1961.04.06
申请号
GB19600001944
申请日期
1960.01.19
申请人
AMERICAN IRON & MACHINE WORKS COMPANY, INC.
发明人
分类号
E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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