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发明名称
Turbine de forage perfectionnée, en plusieurs sections, pour sondages profonds
摘要
申请公布号
FR1273706(A)
申请公布日期
1961.10.13
申请号
FR19600844036
申请日期
1960.11.16
申请人
J. M. VOITH G. M. B. H.
发明人
分类号
E21B4/02;E21B7/08
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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