"An unknown armed gang attacked the gas pipeline," an unnamed security source told Reuters, adding that the flow of gas to Israel and Jordan had been hit.

“一帮未知的武装歹徒攻击了燃气管道，”一位没有透露姓名的安全资源官员告诉路透通讯社，他还说到，输往以色列和约旦的燃气承受了打击。

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This can occur when a valve between a high-pressure gas source and a low-pressure flow circuit is opened quickly.

当迅速开启在高压气源和低压气流回路之间的阀门时，会发生绝热压缩。

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For measuring the mean flowrate of pulsating gas flow, damping chamber is set between the pulsating source and the flowmeter to damp the pulsating effects.

在用节流流量计测量周期性脉动气流的平均流量时，需要在脉动源与流量计之间添加稳压箱以减弱脉动对流量计的影响。

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At present, 80% of Russian gas exports to the EU flow through pipelines across Ukrainian soil, a source of ongoing tension.

BBC: Nord Stream gas pipeline opened by Merkel and Medvedev