These parts can be grouped into four major categories: body, engine, chassis and electrical equipment.
这些零部件主要分为四类：车身、发动机、底盘和电气设备。
A major potential for cost saving lies in vehicles' electrical equipment.
在降低成本方面，机车车辆电气装置中有很大潜力。
A major potential for cost saving lies in vehicles' electrical equipment.
在降低成本方面，机车车辆电气装置中有很大潜力。
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