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发明名称
LOESGJOERBART SPYD FOR OPPFISKING AV ROERELEMENTER I ET BOREHULL
摘要
申请公布号
NO850859(A)
申请公布日期
1985.09.03
申请号
NO19850000859
申请日期
1985.03.04
申请人
SMITH INT (NORTH SEA) LTD,
发明人
MORRIS, GEORGE H.,;MITCHELL, ROBERT FORBES,
分类号
E21B31/16;E21B31/20;(IPC1-7):E21B/
主分类号
E21B31/16
代理机构
代理人
主权项
地址
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