 |
| |||
| cage construction | |||
| tower structure | |||
| framed structure | |||
| panel type construction | |||
| |||
| tower structure | |||
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框 架式结构 : 10 phrases in 4 subjects |
| Bridge construction | 1 |
| Metallurgy | 1 |
| Technology | 7 |
| Wind Energy | 1 |
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