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发明名称
Delt kutterring for kutter til bergboring
摘要
申请公布号
NO982949(D0)
申请公布日期
1998.06.25
申请号
NO19980002949
申请日期
1998.06.25
申请人
NARVESTAD AS, STEIN
发明人
NARVESTAD, STEIN
分类号
E21C;(IPC1-7):E21C
主分类号
E21C
代理机构
代理人
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地址
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