由于现有瞬时测频技术精度的限制，无法直接对其频率跟踪精度进行检定。

For the limitation of the accuracy of IFM technology, the frequency tracking accuracy can't be examined directly.

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对小学教员进行检定的工作，也在各自区域内以不同的内容和方式延续着。

The work of certifying primary school teacher was continued in their respective regions with different content and way.

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双流量计法是一种新的换向器检定方法，使用两台串联流量计对换向器进行检定。

Double flowmeters method is a new method to verify diverters, and two flowmeters are used in the tandem arrangement.

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