Does the double clip pneumatic butterfly valve open or close No. 2 port? Function of shock absorber on railway and train
At the beginning of the early railway, when the train was running on it, it was often accompanied by great noise and intense vibration. At that time, because there were no good equipment components to offset or weaken these problems, with the development of science and technology, the train became a train, and the speed of operation was increasing, and the noise and vibration generated were also increasing. Therefore, composite materials separated from metal are created, and one element of these composite materials is shock absorber