| http://www.w3.org/ns/prov#value | - Thus: In the timing sub-unit and in the digital switch, where the times of access are very short (for instance ranging from 0.3 to 1 microsecond), the reference pulse serves to ensure the switching, or the setting in memory, of the information and this pulse permits of knowing whether there are or not two informations following each other at an interval smaller or greater than a duration T taken a
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