Mount the transmission on a transmission jack and secure the transmission with safety chains.

在一个变速箱千斤顶上放置变速箱并用安全带固定变速箱。

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K. Attach reflectors to housings by means of safety chains, which shall prevent reflectors from falling.

当房间中采用通过铰链安装的附加反射系统时，应该防止这些反射器从高处跌落。

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All emergency ladder safety chains shall be up at all times except when person is entering or leaving ladder.

所有紧急梯安全链要随时挂上，除人员正在进入或离开梯子时。

youdao

It uses silver light-fixture pull-chains and safety pins, not as embellishment but as structural elements in a fairy-tale transformation.

WSJ: Loud, Fast and Nasty | Punk: Chaos to Couture | Metropolitan Museum of Art | By Laura Jacobs

Safety considerations will be taken care of by having chains of approved dealers who meet manufacturers' technical standards for repair and maintenance work.

ECONOMIST: Car industry

The recent spate of accidents in the garment trade, especially in Bangladesh, where in addition to the building collapse more than 100 have also died in factory fires over the past year has led labor unions and worker-safety groups to press Western retailers to tighten oversight of their supply chains.

WSJ: 3 Die in Cambodia Factory Collapse