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发明名称
FREMGANGSMAATE FOR FORSEGLING AV ET ROERFORMET METALLELEMENT
摘要
申请公布号
NO890990(D0)
申请公布日期
1989.03.08
申请号
NO19890000990
申请日期
1989.03.08
申请人
BRITISH PETROLEUM COMPANY PLC, THE
发明人
JOHNSON, ROY ALBERT;MURRAY, STEPHEN GREGORY;REPPELL, PETER NELSON
分类号
B21D26/08;F16L55/10;F42D3/00;(IPC1-7):E21B29/08
主分类号
B21D26/08
代理机构
代理人
主权项
地址
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