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发明名称
Submergible drilling rig foundation and method of constructing same
摘要
申请公布号
US2540878(A)
申请公布日期
1951.02.06
申请号
US19480044626
申请日期
1948.08.17
申请人
HAYWARD JOHN T
发明人
HAYWARD JOHN T.
分类号
E02B17/02
主分类号
E02B17/02
代理机构
代理人
主权项
地址
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