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发明名称
Elevator for pipes
摘要
申请公布号
US2496360(A)
申请公布日期
1950.02.07
申请号
US19470727712
申请日期
1947.02.10
申请人
STANDARD OIL DEVELOPMENT COMPANY
发明人
STONE ALBERT L.
分类号
E21B19/06
主分类号
E21B19/06
代理机构
代理人
主权项
地址
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