The two double idler wheels can be changed to two single idler wheels and to turn into a hybrid car of vehicle with drive equipment on the frame.
在需要时可将两对滚轮改为两个单滚轮，并可在车架上加挂上动力设备，使之成为混合动力车或机动车。
The two double idler wheels can be changed to two single idler wheels and to turn into a hybrid car of vehicle with drive equipment on the frame.
在需要时可将两对滚轮改为两个单滚轮，并可在车架上加挂上动力设备，使之成为混合动力车或机动车。
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