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发明名称
BORRNINGSSTOED
摘要
申请公布号
FI58676(C)
申请公布日期
1981.03.10
申请号
FI19710001781
申请日期
1971.06.23
申请人
GEBR BOEHLER & CO AG
发明人
HUSZAR JOSEF;SCHOEN KONRAD
分类号
E21B15/04;(IPC1-7):E21C11/00
主分类号
E21B15/04
代理机构
代理人
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地址
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