Two grounded systems were analyzed and the correct way to select grounded system was presented.

分析了两种接地系统及怎样正确选择接地系统。

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The authors propose a constant pulse method to control the chaos of ferroresonance in neutral grounded system.

提出了常值脉冲法对中性点接地系统所发生的铁磁谐振混沌状态进行抑制。

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This paper proposes a new method for the fault line and fault area detection in radial neutral-point resonant grounded system.

提出了一种针对辐射状谐振接地系统确定单相接地故障线路及故障区域的新方法。

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Experience shows us that transmission becomes widespread within the passenger cabin involving all sections when the ventilation system is not working -- as evidenced by an influenza outbreak in 1979 involving passengers being kept aboard grounded aircraft with an inoperative ventilation system.

CNN: Commentary: Flu and your health on a plane

Both Mr Obama and Mr Kenny hailed airline Ryanair's announcement on Tuesday that it will buy 175 jets from Chicago-based Boeing Co, which has struggled ever since its new 787 Dreamliner was grounded by regulators in January following problems with its electrical system.

BBC: Peter Robinson and Martin McGuinness meet Barack Obama