E - Fixed Constructions – 21 – B
Inventor
E - Fixed Constructions
21
B
Inventor
Country: Ussr
Articulated coupling
Hinge joint of bottom-hole helical planetary hydraulic machine
Rotor of a screw hydraulic downhole motor, method for its...
Working member of a helical downhole motor for drilling wells
Rotor of a screw hydraulic downhole motor, method for its...
Working member of a helical downhole motor for drilling wells
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