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经营范围
发明名称
Adjustable kelley drive bushing
摘要
申请公布号
US2559100(A)
申请公布日期
1951.07.03
申请号
US19480042655
申请日期
1948.08.05
申请人
WHITE WILL L
发明人
WHITE WILL L.
分类号
E21B3/04
主分类号
E21B3/04
代理机构
代理人
主权项
地址
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