| 摘要 |
The proposed device for checking the service life of a group of switching units contains current transducers, comparators, switches, OR logic elements, triggers, pulse counters, a reset circuit for the proposed device, a pulse forming circuit, time delay units, AND logic elements, a pulse generator, decoding units, a NOT logic element, a differentiator, a coding unit, EXCLUSIVE OR logic elements, and scaling amplifiers.
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