It is a protective switch to realize automatic alarm and stop.

是实现自动警和停机的一种保护性开关。

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Aiming at the shortage of conventional overhead travelling crane control system, the application of a novel control and protective switch in innovation for overhead travelling crane was introduced.

针对传统天车控制系统的不足，介绍了一种新型控制与保护开关在天车改造中的应用。

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Many genes help to prevent tumours from growing, but disruption of the epigenome can switch these protective genes off by accident.

许多基因有助于防止肿瘤的生长，但表观基因组遭到破坏时，可能会碰巧把这些具有保护作用的基因切换到关闭状态。

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Perhaps the more significant, and less noted, event that forced Romney to switch his protective coloring was the resignation in September 2004 of House Speaker Tom Finneran, a staunch social conservative who ruled the Massachusetts House with an iron hand.

CNN: Will Romney lurch to the center?

Sir Alex Ferguson made a tactical switch after 66 minutes, replacing Saha with John O'Shea, who was pushed into a protective role in front of the back four.

BBC: Wayne Rooney celebrates putting Man Utd ahead in the derby