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经营范围
发明名称
ROCK DRILLING APPARATUS.
摘要
申请公布号
IE24955(L)
申请公布日期
1962.01.07
申请号
IE19640000333
申请日期
1961.06.30
申请人
HALIFAX TOOL CO. LTD.
发明人
分类号
E21B;E21C;(IPC1-7):E21B
主分类号
E21B
代理机构
代理人
主权项
地址
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