The current is transmitted to the electric motors, actuating each of the wheels of the power car and the trailers. 佚名.神奇的知识之书.
In the equipments owned by such companies there are included 68,636 electric cars and 17,568 trailers and others, making a total of 86,204 of such vehicles. 弗兰克·刘易斯·戴尔.爱迪生的生平和发明.