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发明名称
Wheel supported apparatus having a vertically movable carrier for a power driven mechanism
摘要
申请公布号
US2718118(A)
申请公布日期
1955.09.20
申请号
US19500196884
申请日期
1950.11.21
申请人
THE BAKER-RAULANG COMPANY
发明人
BENJAMIN GEORGE W.
分类号
E21B7/02;E21D20/00
主分类号
E21B7/02
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代理人
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