这个计数器显示最近两个保留取样值的差，再除以取样间隔。

This counter displays the difference between the values observed in the last two samples, divided by the duration of the sample interval.

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现在可以根据需要改为更小的值(有效的取样速率是30s、60s、300s、1800s和3600s)。

This can now be changed to less than that, depending on what you need (possible sample rates are 30s, 60s, 300s, 1800s and 3600s).

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本文探讨了分散剂、超声波分散时间、搅拌取样等因素对发泡剂AD C粒度测试值的影响。

This paper probes into the influences of such factors as dispersing agent, ultrasonic dispersion time, and stirring sample on the value of the grain size of foaming agent ADC.

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