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发明名称
HAMMER DRILL
摘要
申请公布号
IE881229(L)
申请公布日期
1988.10.23
申请号
IE19880001229
申请日期
1988.04.22
申请人
MERVYN SAMUEL JAMES ENNIS
发明人
分类号
E21B4/00;(IPC1-7):E21B4/00
主分类号
E21B4/00
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