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发明名称
Dichtungsanordnung
摘要
申请公布号
DE1179431(B)
申请公布日期
1964.10.08
申请号
DE1961H042806
申请日期
1961.06.08
申请人
HUGHES TOOL COMPANY
发明人
CUNNINGHAM ROBERT ASHLEY
分类号
E21B10/22;E21B10/25;F16J15/34
主分类号
E21B10/22
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代理人
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