... to start ,working smooth ,small additional dynamic load,long stroke,low energy consumption,working reliable,easy to operation and ... the advantage of working smooth ,small additonal dynamic load,long stroke ,low energy consumption and high combined efficiency.It ... unitType API spec 11ERated suspension center loadReducer TorqueStroke Stroke FrequencyMotor Power Machine QualityCYJ3-0.75-2.8HY25-64 ...