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| updown counter | |||
| backwardforward counter (ssn) | |||
| fwd-bck counter | |||
| add-subtract counter; backward-forward counter; backward-for-ward counter | |||
| reversible counter (осуществляет суммирование или вычитание импульсов в зависимости от знака управляющего сигнала) | |||
| up/down counter (ssn) | |||
| bidirectional counter; forward-backward counter; reciprocal counter; reversible counter; up-down counter | |||
| reversible scaler; forward/reverse counter | |||
| реверсивный счётчик: 6 phrases in 4 subjects |
| Automated equipment | 1 |
| Electronics | 2 |
| Physics | 1 |
| Programming | 2 |