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发明名称
BOHRVORRICHTUNG MIT KOLLEKTOREINRICHTUNG ZUM DURCHLEITEN VON FLUIDEN
摘要
申请公布号
DE2520542(B2)
申请公布日期
1977.12.29
申请号
DE19752520542
申请日期
1975.05.06
申请人
发明人
分类号
E21B7/02;E21B15/00;E21B15/04;E21B19/08;(IPC1-7):E21C11/00
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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