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自动 气门 : 16 phrases in 10 subjects |
| Automobiles | 4 |
| Aviation | 1 |
| Drilling | 1 |
| Life sciences | 1 |
| Metallurgy | 1 |
| Scuba diving | 1 |
| Shipbuilding | 2 |
| Submarines | 1 |
| Technology | 3 |
| Textile industry | 1 |
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