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经营范围
发明名称
AANGEDREVEN DRAAIBAAR SLIPSAMENSTEL.
摘要
申请公布号
NL7613825(A)
申请公布日期
1977.07.12
申请号
NL19760013825
申请日期
1976.12.13
申请人
BJ-HUGHES, INC. TE LONG BEACH, CALIFORNIE, VER. ST. V. AM.
发明人
分类号
E21B3/04;E21B19/06;E21B19/10;(IPC1-7):E21B19/10
主分类号
E21B3/04
代理机构
代理人
主权项
地址
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