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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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。

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Therefore, the adjustment of small four-wheel tractor and trailer brakes simultaneously host should be to adjust the main trailer.

因此，调整小四轮拖拉机主机与挂车刹车同步时，应以调整挂车为主。

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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