4.As for the All Dowry Retarder Continuous Type Speed Control System, this paper suggests that it should be applied carefully because it is not suitable for increasing classification capability of the humpyard.
5.As proven by this analysis, a hybrid system employing clasp retarder (target shooting) ——hydraulic retarder unit (continuous control) has optimum structure, operational effectiveness and can be adapted widely in all type of humpyard of Chinese Railway.
