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发明名称
Method of testing drilling fluid
摘要
申请公布号
US2217175(A)
申请公布日期
1940.10.08
申请号
US19380225954
申请日期
1938.08.20
申请人
UNION OIL COMPANY OF CALIFORNIA
发明人
LEDBETTER JERRY T.
分类号
E21B21/06
主分类号
E21B21/06
代理机构
代理人
主权项
地址
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