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有关制动的书籍里一般都有这样一个假设:在空气制动机内,空气的压力与体积变化是按等温过程进行的。因此,给人以制动机内空气的温度始终与外温相等或相差很小
The book on braking generally has an assumption that in air brakes, the pressure and volume changes of air are carried out isothermally. Therefore, given the temperature of the air inside the brake is always the same or a small difference with the external temperature