| |||
| случай невыполнимости (Alexander Matytsin) | |||
|
impossibility event : 2 phrases in 2 subjects |
| Mathematics | 1 |
| Quality control and standards | 1 |
| |||
| случай невыполнимости (Alexander Matytsin) | |||
|
impossibility event : 2 phrases in 2 subjects |
| Mathematics | 1 |
| Quality control and standards | 1 |