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发明名称
URZADZENIE DO PRZEMIESZCZANIA ODCINKA PRZEWODU WIERTNICZEGO W OTWORZE WIERTNICZYM
摘要
申请公布号
PL201923(A1)
申请公布日期
1978.07.17
申请号
PL19770201923
申请日期
1977.11.05
申请人
JOHANSSON SVEN H
发明人
JOHANSSON SVEN H
分类号
E21B;E21B4/18;E21B7/00;E21B21/16;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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