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发明名称
Tubing stop
摘要
申请公布号
US2108605(A)
申请公布日期
1938.02.15
申请号
US19360087579
申请日期
1936.06.26
申请人
MOSELEY CHARLES F
发明人
MOSELEY CHARLES F.
分类号
E21B31/20
主分类号
E21B31/20
代理机构
代理人
主权项
地址
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