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发明名称
METHOD AND APPARATUS FOR DRILLING UNDERWATER WELLS
摘要
申请公布号
CA757942(A)
申请公布日期
1967.05.02
申请号
CAD757942
申请日期
申请人
SHELL OIL COMPANY
发明人
BRUCE J. WATKINS
分类号
主分类号
代理机构
代理人
主权项
地址
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