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经营范围
发明名称
Drilling mud
摘要
申请公布号
US2357497(A)
申请公布日期
1944.09.05
申请号
US19430489701
申请日期
1943.06.04
申请人
THE PURE OIL COMPANY
发明人
BOND DONALD C.
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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