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经营范围
发明名称
Rock drill adapted to inject fluid into a bore hole
摘要
申请公布号
US2764387(A)
申请公布日期
1956.09.25
申请号
US19530331354
申请日期
1953.01.15
申请人
JOSEPH DIONISOTTI
发明人
DIONISOTTI JOSEPH
分类号
E21B7/00;E21B7/28;E21B17/00;E21B17/04;E21B17/10;E21B21/00;E21B21/12;E21B21/14;E21B31/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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