一台新购置的机械设备，评估人员给出的成新率应该是100％。然而，这样的设备在运行时是否处于最好的状态呢？一般来说不是的。图1是机械设备磨损曲线。图1机器设备磨损曲线由图1可知，机械设备的磨损可分为三个阶段。第1阶段称为初期磨损阶段。在这个阶段，通过初期磨损，机器 A new purchase of machinery and equipment, assessors given a new rate should be 100%. However, such equipment is running in the best condition? Generally not. Figure 1 is the mechanical equipment wear curve. Figure 1 wear and tear of machinery and equipment From Figure 1 we can see that the wear and tear of machinery and equipment can be divided into three stages. The first stage is called the initial wear stage. At this stage, through the initial wear and tear, the machine