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发明名称
Système de paliers pour l'arbre de turbines hydrauliques actionnant l'outil de perforation dans les forages profonds
摘要
申请公布号
FR1173551(A)
申请公布日期
1959.02.26
申请号
FRD1173551
申请日期
1957.04.09
申请人
MANNESMANN-TRAUZL AKTIENGESELLSCHAFT
发明人
分类号
E21B4/02
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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