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发明名称
Rotary drill bit
摘要
申请公布号
US3193028(A)
申请公布日期
1965.07.06
申请号
US19620226248
申请日期
1962.09.26
申请人
ESSO PRODUCTION RESEARCH COMPANY
发明人
RADZIMOVSKY EUGENE IVAN
分类号
E21B10/22;E21B10/24
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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