If the changeover point of the above closing law is located in the S-shape effect zone, there is only one pressure peak.

若机组关闭规律不变而拐点位置已经进入反“S”区域，蜗壳进口压力将呈现为单峰形态。

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Secondly, if the two-segment closing law, the guide vanes close slowly first and then faster, only one pressure peak will be left.

当机组采用先慢后快的两段折线式导叶关闭规律时，蜗壳进口压力只有单峰。

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The origin of the unit vibration in small guide vane opening is analyzed when the unit is closing and the optimal scheme of the unit closing law is suggested.

本文拟对关机过程中导叶小开度振动原因进行分析，并对机组关闭规律的优化方案及实施过程进行介绍。

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Also,this year the law will start closing what is known as "the doughnut hole."

VOA: special.2010.03.24

His detractors see his end as an encouraging if brutal sign that the days when the rich and powerful can ignore the law are closing.

ECONOMIST: Argentina: Death and corruption | The

They added they were closing a loophole in the law that appeared with the opening of private clinic Marie Stopes.

BBC: 'Abortions only via NHS' law change bid by two MLAs

They said they were closing a loophole in the law.

BBC: Stormont rally opposes any abortion law change