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发明名称
HYDRAULIC LIFT OF UNDERWATER DRILLING RIG
摘要
申请公布号
SU796380(A1)
申请公布日期
1981.01.15
申请号
SU19792742669
申请日期
1979.03.26
申请人
GARANKO YURIJ L,SU
发明人
GARANKO YURIJ L,SU
分类号
E21B15/02;(IPC1-7):E21B15/02
主分类号
E21B15/02
代理机构
代理人
主权项
地址
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