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发明名称
MULTI-FUNCTION ANNULAR SEALING ELEMENT
摘要
申请公布号
GB2094419(B)
申请公布日期
1984.08.30
申请号
GB19820005468
申请日期
1982.02.24
申请人
MINES DE POTASSE D'ALSACE SA
发明人
分类号
E21D15/44;F15B15/14;F16J10/02;(IPC1-7):F16J15/32
主分类号
E21D15/44
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代理人
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