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| carbonate hardness | |||
| alkaline hardness; temporary hardness | |||
| 碳酸盐硬度: 11 phrases in 6 subjects |
| Architecture | 1 |
| Earth sciences | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 1 |
| Technology | 5 |
| Water resources | 2 |
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