The iron wheels of carriages ground the stones of the top level into a continually smoother and more watertight surface.

当时马车的铁轮不断地将那些碎石碾得越来越平整、防水性越好的磨损面。

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This fore-carriage was composed of a massive iron axle-tree with a pivot, into which was fitted a heavy shaft, and which was supported by two huge wheels.

它的组成部分是一条装在两个巨轮上的粗笨铁轴和一条嵌在轴上的粗笨辕木。

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The rusty iron chain that double-locked the cart to the front wheels of the cycle began to squeal as he rode.

三轮车前面轮胎上双重锁上的铁链生了锈，在骑动的时候发出刺耳的声音。

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It was an open cart with two wooden-spoked, iron-rimmed wheels, not the old automobile tires that you used to see on a common utility wagon.

NPR: Excerpt: 'World Made By Hand'

You could still find rubber tires here and there, but you couldn't get patch kits or the kinds of adhesives that would stand up to a repair job anymore, so we had no choice but to go back to wooden wheels with iron rims.

NPR: Excerpt: 'World Made By Hand'

In Scranton, a sooty mining town, she was miserable when the locomotives were fitted with iron skirts that hid how the wheels and pistons moved.

ECONOMIST: Jane Jacobs