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发明名称
Well drilling apparatus
摘要
申请公布号
US3158211(A)
申请公布日期
1964.11.24
申请号
US19570684176
申请日期
1957.09.16
申请人
LEYMAN CORPORATION
发明人
MCCUE ALFRED W.;DIAMOND PAUL S.;KINTIGH DOYLE L.;O'NEILL JOSEPH V.;MOSER JESSE R.
分类号
E21B19/20
主分类号
E21B19/20
代理机构
代理人
主权项
地址
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