... adopt the rubber with the best rated hardness and stablilizing in order to reduce upright pressure and shearing force.The top ... usually need to eliminate the vibration of axle and radiation;In addition, there are fule leak, diesel pollution and long exposure ... -20-60°C. 3.Beside these, they are widely used in generators, air-blowers, compressors, pumps, air compressors, test machines, and other ...