 |
| |||
| permanent hardness; non-alkaline hardness; non-carbonate hardness | |||
| non alkaline hardness | |||
| durete permanente: 2 短语, 2 学科 |
| 供水 | 1 |
| 建造 | 1 |
|
| |||
| permanent hardness; non-alkaline hardness; non-carbonate hardness | |||
| non alkaline hardness | |||
| durete permanente: 2 短语, 2 学科 |
| 供水 | 1 |
| 建造 | 1 |