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经营范围
发明名称
Drill carriage
摘要
申请公布号
US2842340(A)
申请公布日期
1958.07.08
申请号
US19540450069
申请日期
1954.08.16
申请人
DRILL CARRIER CORPORATION
发明人
BURRESS JOHN W.
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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