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发明名称
Method and apparatus for drilling into water covered ground
摘要
申请公布号
US2217879(A)
申请公布日期
1940.10.15
申请号
US19400314068
申请日期
1940.01.16
申请人
SHELL DEVELOPMENT COMPANY
发明人
WILLEY MARNEY BEN
分类号
E02B17/00
主分类号
E02B17/00
代理机构
代理人
主权项
地址
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