The torque-angle characteristics of electric-mechanical converters are important determinants of the quality of electrohydraulic proportional control systems.It
Oil leakage between the slipper and swash plate of an axial piston pump has a significant effect on the efficiency of the pump.Therefore,it is extremely importa
Al-Li alloy is a new structural material with the advantages of lightweight and high strength.The extrusion profiles of Al-Li alloy are widely used in aerospace