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经营范围
发明名称
Percussive drilling tools
摘要
申请公布号
GB414322(A)
申请公布日期
1934.08.02
申请号
GB19340008712
申请日期
1934.03.20
申请人
INGERSOLL-RAND COMPANY
发明人
分类号
E21B17/042
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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