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经营范围
发明名称
Drive jar for wells
摘要
申请公布号
US1831942(A)
申请公布日期
1931.11.17
申请号
US19300491516
申请日期
1930.10.27
申请人
BAIMBRIDGE ALPHAEUS C
发明人
BAIMBRIDGE ALPHAEUS C.
分类号
E21B4/08
主分类号
E21B4/08
代理机构
代理人
主权项
地址
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