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经营范围
发明名称
Dump bailer
摘要
申请公布号
US2896722(A)
申请公布日期
1959.07.28
申请号
US19560583968
申请日期
1956.05.10
申请人
SUN OIL COMPANY
发明人
BARNES WILLIAM E.
分类号
E21B27/02
主分类号
E21B27/02
代理机构
代理人
主权项
地址
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