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经营范围
发明名称
PUTWERKTUIG.
摘要
申请公布号
NL8302164(A)
申请公布日期
1984.01.16
申请号
NL19830002164
申请日期
1983.06.17
申请人
CAMERON IRON WORKS, INC. TE HOUSTON, TEXAS, VER.ST.V.AM.
发明人
分类号
E21B33/04;E21B33/043;E21B33/14;E21B37/00;(IPC1-7):E21B33/14
主分类号
E21B33/04
代理机构
代理人
主权项
地址
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