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| water hardness | |||
| water hardness The amount of calcium and magnesium salts dissolved in water; hardness of water | |||
| dureté de l'eau: 16 phrases in 5 subjects |
| Construction | 9 |
| Fish farming pisciculture | 1 |
| Medical | 1 |
| Natural resourses and wildlife conservation | 3 |
| Water supply | 2 |