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| обессмоливание | |||
| очистка от смолы | |||
| отделение гудрона; удаление смолы | |||
| осаждение дёгтя | |||
| detarring: 6 phrases in 4 subjects |
| Energy industry | 1 |
| Oil and gas | 1 |
| Technology | 3 |
| Transport | 1 |
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