A set of electric control system of unit emergency stop device controlled by PLC was designed.

设计出一套由PLC进行控制的紧急事故停机装置电气控制系统。

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Stroke protection, Force and Elongation protection, Emergency stop device, Sensing device when specimen is destroyed.

行程上下限均附安全距离设定，紧急停止键，程序力量及伸长设定，试件破坏感测。

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The machine includes one photoelectric safety protection device and one emergency stop button to ensure the operators' safety.

机器包含一套安全光栅和急停按钮，保证操作安全。

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British oil company BP, one of the firms operating the rig, has not been able to activate a device known as a blow-out preventer, designed to stop oil flow in an emergency.

BBC: Growing concerns over Gulf of Mexico oil leak