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二氯二氟甲烷 : 23 phrases in 11 subjects |
| Automobiles | 2 |
| Chemistry | 2 |
| Ecology | 1 |
| Electronics | 1 |
| General | 3 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Pharmacology | 1 |
| Refrigeration | 3 |
| Space | 1 |
| Technology | 5 |
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