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| 等酸碱度线; 等氢离子的; 等pH值线 | |||
| isohydric: 12 phrases in 7 subjects |
| Agriculture | 2 |
| Chemistry | 2 |
| Engineering geology | 1 |
| Metallurgy | 2 |
| Molecular genetics | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |
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