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经营范围
发明名称
Swab mandrel
摘要
申请公布号
US2998990(A)
申请公布日期
1961.09.05
申请号
US19580752737
申请日期
1958.08.04
申请人
THE GUIBERSON CORPORATION
发明人
PLATTSMIER RODNEY L.;CROW MORGAN L.
分类号
E21B37/10
主分类号
E21B37/10
代理机构
代理人
主权项
地址
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