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安全荷载 : 61 phrases in 19 subjects |
| Architecture | 2 |
| Automobiles | 3 |
| Aviation | 1 |
| Bridge construction | 2 |
| Business | 1 |
| Compressors | 1 |
| Computer networks | 2 |
| Cryptography | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 2 |
| Engineering geology | 3 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 2 |
| Information technology | 1 |
| Nautical | 4 |
| Oil / petroleum | 2 |
| Space | 2 |
| Technology | 29 |
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