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发明名称
BOHRROHR.
摘要
申请公布号
AT88242(T)
申请公布日期
1993.04.15
申请号
AT19890730171T
申请日期
1989.07.25
申请人
MANNESMANN AKTIENGESELLSCHAFT
发明人
KRUG, GERHARD, DR.-ING.
分类号
E21B17/00;E21B17/042;F16L15/00;(IPC1-7):E21B17/042
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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