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| efficiency standard; standard of efficiency | |||
| efficiency criteria | |||
| efficiency standards | |||
| 效率 标准: 13 phrases in 6 subjects |
| Business | 3 |
| China | 2 |
| Oil / petroleum | 1 |
| Oil processing plants | 1 |
| Technology | 5 |
| Water resources | 1 |
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