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发明名称
Magnetic orienter for well core barrels
摘要
申请公布号
US1935078(A)
申请公布日期
1933.11.14
申请号
US19270216544
申请日期
1927.08.31
申请人
STANDARD OIL COMPANY OF CALIFORNIA
发明人
CAVINS OMAR A.
分类号
E21B25/16
主分类号
E21B25/16
代理机构
代理人
主权项
地址
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