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The red box shows the part of the trace where where the switch assembly (slide, clamps etc.) is in motion. The grey box shows where the movement has finished. This final region is not often relevant when diagnosing abnormal points behaviour. r.
It is therefore excluded in many places when calculating the average pressure and peak pressure. Where this is done, the average pressure excluding the grey region and the peak pressure excluding the grey region tend to be referred to as simply the average and the peak.
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