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| block structure; massive structure | |||
| block work | |||
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块体结构 : 15 phrases in 6 subjects |
| Electronics | 5 |
| Engineering geology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 1 |
| Space | 2 |
| Technology | 5 |
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