The single-wheel walking tractor is a kind of promising agricultural machinery.

独轮拖拉机是一种很有发展前途的农业机械。

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The designing methods and key points are introduced and the designing procedure is also presented in this paper. A new style single-wheel walking tractor is developed by the presented idea.

阐述了这种拖拉机的设计思想及要点，给出了主要部件的设计方法，并利用这种思想方法开发设计了新型的独轮拖拉机。

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The front has a single wheel.

只有一个前轮。

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Mr. Warming pointed to another picture of the spare, yet modern, steering-wheel column and single large dashboard dial on an old 1960s Mini, the inspiration for the minimalist dashboard of the Mini Rocketman, an even tinier Mini concept car that made its debut at the Geneva Motor Show in March.

WSJ: Anders Warming: The Man Who Reinvents Wheels | Creating

To start with, they had to rely on a high-resolution camera mounted on a frame, and a series of filters attached to a rotating wheel, to create a set of single-frequency images from the same perspective, in order that they could be merged as desired.

ECONOMIST: Monitor