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经营范围
发明名称
Milling cutter for use in oil wells
摘要
申请公布号
US2846193(A)
申请公布日期
1958.08.05
申请号
US19570632932
申请日期
1957.01.07
申请人
JACK CHADDERDON
发明人
CHADDERDON JACK
分类号
E21B29/00
主分类号
E21B29/00
代理机构
代理人
主权项
地址
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