Metal gears to process particularly hot products are available on request;

金属齿轮传送，特别适合加工特别热的产品；

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Gears, metal plates - it all looks quite solid.

齿轮，金属板——它们看起来好像很坚固。

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During ausform finishing process of hardened gears, there is plastic displacement of metal on the tooth surface and the distortion of tooth profile.

在齿轮热滚挤加工中，轮齿上的金属在强制挤压力的作用下沿齿面产生塑性流动，使齿形发生变化。

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The sunny patio is adorned with industrial art including massive, rusty metal sculptures of gears, screws, nuts and bolts.

BBC: Gateway to the Blue Ridge Mountains

Notice how it always begins with the brighter, shinier Autobots, but slowly descends into grease-covered gears and whirling metal that has less and less clear form.

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Looters have meticulously stripped Gharmat Ali, down to the gears and motors from pumps, even the buildings' metal siding.

FORBES: Magazine Article