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| refrigeration pipe | |||
| clod-air pipe; cold air pipe | |||
| 冷气管: 69 phrases in 16 subjects |
| Automobiles | 6 |
| Aviation | 2 |
| Business | 1 |
| Chemistry | 4 |
| Electronics | 1 |
| General | 3 |
| Management | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 6 |
| Radio | 1 |
| Rail transport | 1 |
| Refrigeration | 3 |
| Shipbuilding | 6 |
| Space | 2 |
| Technology | 27 |
| Wind Energy | 1 |
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