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发明名称
Rueckgewinnbarer Bohrlochpacker
摘要
申请公布号
DE1558987(A1)
申请公布日期
1970.04.23
申请号
DE19671558987
申请日期
1967.12.04
申请人
MINISTERUL INDUSTRIEI PETROLULUI
发明人
ION ADAMACHE,DIPL.-ING.;IOAN IACOB,DIPL.-ING.
分类号
E21B33/128
主分类号
E21B33/128
代理机构
代理人
主权项
地址
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