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| 245 | 0 | _aFrontiers in Energy Efficiency | |
| 260 | _aSwitzerland | ||
| 260 | _bFrontiers Media S.A. | ||
| 650 | _a Energy conservation | ||
| 650 | _a Mechanical engineering and machinery | ||
| 650 | _aTechnology | ||
| 856 | _uhttps://doaj.org/toc/e5f75841883d47f5ab0b94514adcd8ff | ||
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