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发明名称
AN APPARATUS IN ROCK DRILLING MACHINES OR THE LIKE
摘要
申请公布号
EP0293379(B1)
申请公布日期
1991.05.15
申请号
EP19870901157
申请日期
1987.02.03
申请人
DIAMANT BOART CRAELIUS AKTIEBOLAG
发明人
JONSSON, GUNNAR
分类号
E21B19/14
主分类号
E21B19/14
代理机构
代理人
主权项
地址
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