1. High-power TSP bits;Cohen;J Energy Res Technol,1994
2. Introduction to petroleum machinery;Zhou,2002
3. New hydraulic lift rig for drilling and workover;Moak;World Oil,1996
4. New investigation in energy regeneration of hydraulic elevators;Yang;IEEE/ASME Trans Mechatron,2007
5. Research on the system of arm potential energy recovery in hybrid hydraulic excavators;Lin;Trans Chin Soc Agric Mach,2009