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发明名称
DEEP WELL DRILLING APPARATUS
摘要
申请公布号
CA433342(A)
申请公布日期
1946.03.05
申请号
CAD433342
申请日期
申请人
JAMES W. MENHALL
发明人
JAMES W. MENHALL
分类号
主分类号
代理机构
代理人
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