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发明名称
RELEASING DEVICE IN CORE BARREL GRAPPLERS
摘要
申请公布号
EP0049698(A3)
申请公布日期
1984.08.01
申请号
EP19810850182
申请日期
1981.10.07
申请人
CRAELIUS AB
发明人
ERIKSSON, SUNE WILHELM;ENGELOV, KRISTOFFER
分类号
E21B25/02;(IPC1-7):E21B25/02
主分类号
E21B25/02
代理机构
代理人
主权项
地址
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