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经营范围
发明名称
Drilling fluid
摘要
申请公布号
US2352468(A)
申请公布日期
1944.06.27
申请号
US19410420266
申请日期
1941.11.24
申请人
BURNAM THOMPSON W
发明人
BURNAM THOMPSON W.
分类号
C09K8/20
主分类号
C09K8/20
代理机构
代理人
主权项
地址
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