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发明名称
METHOD FOR DRILLING WELLS, HIDRAULIC WELL DRILL MOTOR SITUATED IN GROUND LEVEL AND PORT CONTROL APPARATUS FOR AXIAL PISTON MOTORS
摘要
申请公布号
HU210331(B)
申请公布日期
1995.07.28
申请号
HU19930003797
申请日期
1993.12.31
申请人
SIMON,LAJOS
发明人
SIMON,LAJOS
分类号
E21B4/02;E21B43/00;E21B43/04;F04B1/00;(IPC1-7):E21B4/02
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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