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| économie d'énergie (Предотвращение неоправданной траты энергии) | |||
| économie en énergie | |||
| gain d'énergie; économie d'énergie | |||
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экономия энергии : 6 phrases in 4 subjects |
| Electronics | 1 |
| Energy industry | 1 |
| Forestry | 2 |
| United Nations | 2 |
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