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触点闭合 : 33 phrases in 10 subjects |
| Automobiles | 5 |
| Aviation | 1 |
| Drilling | 1 |
| Electricity | 1 |
| Electronics | 13 |
| Hydroelectric power stations | 2 |
| Metallurgy | 3 |
| Rail transport | 1 |
| Shipbuilding | 2 |
| Technology | 4 |
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