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绳心 : 47 phrases in 13 subjects |
| Aviation | 1 |
| Drilling | 6 |
| Earth sciences | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 3 |
| Mechanics | 5 |
| Metallurgy | 8 |
| Mining | 1 |
| Mountaineering | 1 |
| Oil / petroleum | 6 |
| Space | 1 |
| Technology | 9 |
| Textile industry | 3 |
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