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经营范围
发明名称
Drill cutter
摘要
申请公布号
US2533257(A)
申请公布日期
1950.12.12
申请号
US19450597304
申请日期
1945.06.02
申请人
HUGHES TOOL COMPANY
发明人
WOODS HENRY B.;SCOTT FLOYD L.
分类号
E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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