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发明名称
KERNROHR ZUR GEWINNUNG VON ORIENTIERTEN BOHRKERNEN.
摘要
申请公布号
DE3780882(T2)
申请公布日期
1993.03.11
申请号
DE19873780882T
申请日期
1987.05.18
申请人
DIAMOND BOART STRATABIT LTD., ABERDEEN, SCOTLAND, GB
发明人
MOORE, TERENCE ALEXANDER, MONTROSE SCOTLAND, GB
分类号
E21B25/16;(IPC1-7):E21B25/16
主分类号
E21B25/16
代理机构
代理人
主权项
地址
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