近年以来,线束复杂程度不断增加,物料种类、导线长度、回路数不断增多;并且线束分配内容也被增加,开始分配动力和信号传送功能。从1950年到2010年普通A级轿车的回路数从不到100个增加到了1000个左右 In recent years, the complexity of harnesses has been continuously increasing. The types of materials, the length of wires and the number of circuits have been increasing. And the distribution of harnesses has also been increased to begin the distribution of power and signal transmission functions. From 1950 to 2010, the number of ordinary A-class sedans increased from less than 100 to about 1,000