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发明名称
GRIPEHODEBJELKE
摘要
申请公布号
NO930759(D0)
申请公布日期
1993.03.02
申请号
NO19930000759
申请日期
1993.03.02
申请人
HOWDEN & COMPANY LIMITED, JAMES
发明人
KLOUMANN, JOHN;EVANS, GRAHAM
分类号
E21B19/15;(IPC1-7):E21B/
主分类号
E21B19/15
代理机构
代理人
主权项
地址
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