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经营范围
发明名称
Blasthole drill
摘要
申请公布号
US3181630(A)
申请公布日期
1965.05.04
申请号
US19620207269
申请日期
1962.07.03
申请人
JOY MANUFACTURING COMPANY
发明人
COBURN ROBERT S.
分类号
E21B15/04;E21B19/14;E21B19/20
主分类号
E21B15/04
代理机构
代理人
主权项
地址
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