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刚性架 : 69 phrases in 13 subjects |
| Agriculture | 1 |
| Architecture | 1 |
| Automobiles | 6 |
| Bridge construction | 4 |
| Electronics | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 2 |
| Mechanics | 1 |
| Metallurgy | 4 |
| Oil / petroleum | 4 |
| Space | 1 |
| Technology | 38 |
| Wind Energy | 3 |
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