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经营范围
发明名称
UTBLAASNINGSSIKRING.
摘要
申请公布号
NO871995(D0)
申请公布日期
1987.05.14
申请号
NO19870001995
申请日期
1987.05.14
申请人
SMEDVIG A/S, PEDER
发明人
ASKELAND, RUNE;LARSEN, VIDAR
分类号
E21B21/10;E21B33/127;E21B34/08;(IPC1-7):E21B/
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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