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发明名称
SKARV FOER SLAGBORRSTAENGER
摘要
申请公布号
FI59848(B)
申请公布日期
1981.06.30
申请号
FI19720000031
申请日期
1972.01.07
申请人
SANDVIK AB
发明人
JOHANSSON ERNST LENNART;LUMEN KARL LENNART GOESTA
分类号
E21B17/042;(IPC1-7):E21B17/042
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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