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| 效率单位 | |||
| 有小厨房及卫生间设备的居住单元 | |||
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| 效率促进组 | |||
| efficiency unit: 15 phrases in 8 subjects |
| Compressors | 2 |
| Ecology | 1 |
| Electronics | 2 |
| Oil / petroleum | 1 |
| Plastics | 1 |
| Refrigeration | 1 |
| Space | 1 |
| Technology | 6 |
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