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经营范围
发明名称
PAKKERINRICHTING VOOR EEN BOORPUT.
摘要
申请公布号
NL8006907(A)
申请公布日期
1981.08.03
申请号
NL19800006907
申请日期
1980.12.19
申请人
BAKER INTERNATIONAL CORPORATION TE HOUSTON, TEXAS, VER. ST. V. AM.
发明人
分类号
E21B33/129;(IPC1-7):E21B33/12
主分类号
E21B33/129
代理机构
代理人
主权项
地址
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