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发明名称
Br°nnhodekapsel
摘要
申请公布号
NO984078(A)
申请公布日期
1998.11.06
申请号
NO19980004078
申请日期
1998.09.04
申请人
EXPRO NORTH SEA LTD
发明人
EDWARDS, JEFFREY CHARLES;MORGAN, MICHAEL GRAHAM
分类号
E21B33/035;E21B47/06;(IPC1-7):E21B33/035
主分类号
E21B33/035
代理机构
代理人
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