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| энергосбережение (Iris1710) | |||
| энергоэффективность (Sergei Aprelikov) | |||
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ahorro de energía : 7 phrases in 5 subjects |
| Computers | 1 |
| Electrical engineering | 2 |
| Energy industry | 2 |
| General | 1 |
| Natural sciences | 1 |
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