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发明名称
Tubing bottom
摘要
申请公布号
US1974664(A)
申请公布日期
1934.09.25
申请号
US19320584633
申请日期
1932.01.04
申请人
PATTEN THOMAS C
发明人
PATTEN THOMAS C.
分类号
E21B10/60;E21B17/00;E21B17/14;E21B43/08
主分类号
E21B10/60
代理机构
代理人
主权项
地址
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