Owing to the limited frequency of the internal high-speed counter of PLC, the peripheral unit of PLC is used for PLC-based frequency measurement of hydraulic turbine governors.

基于可编程序控制器（PLC）的水轮机调速器，受PLC内部高速计数器最高计数频率的限制，频率测量大多通过PLC外部单元来实现。

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Anxiety about sovereign-default risk, and the budget-cutting measures to counter it, will further sap the peripheral economies, thus raising the chances of big losses on the loans British banks have made there.

ECONOMIST: The economy and the euro