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发明名称
MATEFORR D MED BORESTENGER FOR EN DYPBORINGSANORD
摘要
申请公布号
NO160737(B)
申请公布日期
1989.02.13
申请号
NO19830001854
申请日期
1983.05.25
申请人
TAMPELLA AB, OY
发明人
ISSAKAINEN, ONNI
分类号
E21B19/14;E21B19/24;(IPC1-7):E21C9/00;E21B19/20
主分类号
E21B19/14
代理机构
代理人
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