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经营范围
发明名称
Sand testing tool
摘要
申请公布号
US2068108(A)
申请公布日期
1937.01.19
申请号
US19350023606
申请日期
1935.05.27
申请人
OWEN TURNER A
发明人
OWEN TURNER A.
分类号
E21B49/08
主分类号
E21B49/08
代理机构
代理人
主权项
地址
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