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发明名称
UTBLAASNINGSSIKRING
摘要
申请公布号
NO173751(B)
申请公布日期
1993.10.18
申请号
NO19870001587
申请日期
1987.04.14
申请人
CAMERON IRON WORKS INC
发明人
NANCE JAMES G
分类号
E21B33/06;F16K3/00;(IPC1-7):E21B33/06
主分类号
E21B33/06
代理机构
代理人
主权项
地址
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