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发明名称
Oil base drilling fluid
摘要
申请公布号
US2461483(A)
申请公布日期
1949.02.08
申请号
US19440525439
申请日期
1944.03.07
申请人
SHELL DEVELOPMENT COMPANY
发明人
SELF EDWARD S.
分类号
C09K8/32
主分类号
C09K8/32
代理机构
代理人
主权项
地址
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