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| |||
| production materials recovery | |||
| industrial wastes utilization | |||
| scrap recovery; waste disposal (Челядник Евгений) | |||
| materials recovery | |||
| утилизация отходов производства: 9 a las frases, 6 temas |
| Armas de destrucción masiva | 1 |
| Ecología | 4 |
| General | 1 |
| Ingeniería mecánica | 1 |
| Karachaganak | 1 |
| Procesamiento de madera | 1 |