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| orthohydrogen | |||
| normal hydrogen | |||
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正氢 : 21 phrases in 11 subjects |
| Animal husbandry | 1 |
| Chemistry | 3 |
| Dermatology | 1 |
| Electric machinery | 1 |
| General | 1 |
| Geophysics | 1 |
| Metallurgy | 3 |
| Perfume | 4 |
| Plastics | 1 |
| Refrigeration | 3 |
| Technology | 2 |
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