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发明名称
Буровой предохранительный переходник для колонкового бурения скважин
摘要
申请公布号
SU105629(A1)
申请公布日期
1956.11.30
申请号
SU19560550496
申请日期
1956.04.24
申请人
IVANENKO I.I.
发明人
IVANENKO I.I.
分类号
E21B17/06
主分类号
E21B17/06
代理机构
代理人
主权项
地址
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