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发明名称
Means for controlling operation of turbodrill
摘要
申请公布号
US3303893(A)
申请公布日期
1967.02.14
申请号
US19640356019
申请日期
1964.03.27
申请人
VARNEY JUSTIN A;VARNEY FREDERICK M
发明人
VARNEY JUSTIN A.;VARNEY FREDERICK M.
分类号
E21B44/00
主分类号
E21B44/00
代理机构
代理人
主权项
地址
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