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。

youdao

The trailer wheel has an interlayer within which there exists lead or mercury to increase the self weight of the wheel.

拖车车轮是带夹层的，夹层里装有水银或铅，以增加车轮自身重量。

youdao

The motion tracking characteristics of steering Angle based wheel trailer system were studied. Two mechanism models which satisfy the definition of the steering Angle were present.

分析了基于牵引操舵角的轮式拖车系统的运动跟踪特性，提出了两种满足牵引操舵角概念的机构模型。

youdao

Carino Vanorden, 24, was at the wheel Wednesday night when a trailer hauling crushed cars broke free of the big rig that was pulling it, cut across a rural, two-lane road and slammed into the minivan, his mother Kate Vanorden of Fayetteville said.

NPR: Runaway Trailer Crashes Rare; NY Accident Killed 7

Trailers are typically attached to tractors by a "fifth wheel, " in which a coupling pin on the trailer fits into the center of a large horseshoe-shaped piece of metal.

NPR: Runaway Trailer Crashes Rare; NY Accident Killed 7