Driving a tractor-trailer is not an easy job.
驾驶一辆牵引式挂车不是一项容易的工作。
The mechanism consists of driving device, generator trailer wheel, bicycle front wheel device.
新式车辆部件包括驱动装置，发电拖车车轮，电动自行车前轮装置。
The mechanism consists of driving device, generator trailer wheel, bicycle front wheel device.
新式车辆部件包括驱动装置，发电拖车车轮，电动自行车前轮装置。
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