 |
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| requirements for arrangement and safe operation of vessels under pressure (Yeldar Azanbayev) | |||
| требования устройства и безопасной эксплуатации сосудов: 2 a las frases, 1 temas |
| Tengiz | 2 |
|
| |||
| requirements for arrangement and safe operation of vessels under pressure (Yeldar Azanbayev) | |||
| требования устройства и безопасной эксплуатации сосудов: 2 a las frases, 1 temas |
| Tengiz | 2 |