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发明名称
Well apparatus
摘要
申请公布号
US3325190(A)
申请公布日期
1967.06.13
申请号
US19630294844
申请日期
1963.07.15
申请人
FMC CORPORATION
发明人
ECKERT LAWRENCE A.;YANCEY JOHN R.
分类号
E21B33/038
主分类号
E21B33/038
代理机构
代理人
主权项
地址
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