The valve has the two control loops for normal regulation and emergency closure respectively.

此阀有两个控制回路，分别用于正常调节和紧急关闭。

youdao

EU diplomats said ahead of Monday's emergency meeting in Brussels that a draft EU agreement was set to declare the closure of the Balkan migration route.

星期一在布鲁塞尔召开紧急会议之前，欧盟的外交官们表示，即将宣布一项关于关闭巴尔干地区移民通道的欧盟协议草案。

youdao

Analyze the factors which influence failure effect, and constitute mitigation methods of failure effect according to situations of meeting an emergency, closure and management after an accident.

分析了失效后果的影响因素，制定了管道维修措施及流程、事故应急准备和善后措施。

youdao

An emergency closure of Jiggers Bank in Ironbridge took place after rocks fell onto the road following heavy rain.

BBC: Ironbridge Jiggers Bank road closed until June

Guidance from the council says an emergency closure should only be made when it is "absolutely necessary in the best interests of pupils".

BBC: School closures

The exchange's emergency closure 20 minutes early (with curtailed trading announced for the following day, too) leaves what remained of its reputation in tatters, and everyone in government from the prime minister down seething.

ECONOMIST: Japan's stockmarket