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发明名称
SEALING ASSEMBLIES
摘要
申请公布号
GB8821615(D0)
申请公布日期
1988.10.12
申请号
GB19880021615
申请日期
1988.09.15
申请人
COOPER INDUSTRIES INC
发明人
分类号
E21B33/00;E21B33/03;E21B33/04
主分类号
E21B33/00
代理机构
代理人
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地址
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