unfilled square
| set system
| unfilled square abbr. | |
| progr. | пустой квадрат |
| set system abbr. | |
| cyber. | система множеств |
| sport. | система комплексов упражнений |
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| пустой квадрат (ssn) | |||
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unfilled square : 2 phrases in 1 subject |
| Mining | 2 |