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发明名称
CORE BARREL WITH ADJUSTABLE JOINT
摘要
申请公布号
GB8810875(D0)
申请公布日期
1988.06.08
申请号
GB19880010875
申请日期
1988.05.07
申请人
ROE, J R N;DRENTHAM-SUSMAN, H F A V;ORECO HOLDINGS LTD
发明人
分类号
E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
地址
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