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| 结构单元 | |||
| 构造单位 | |||
| 构造单元 | |||
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structure unit : 25 phrases in 15 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Business | 2 |
| Chemistry | 3 |
| Commerce | 1 |
| Corporate governance | 1 |
| Earth sciences | 1 |
| Genetics | 1 |
| Metallurgy | 2 |
| Metalworking | 2 |
| Nautical | 1 |
| Plastics | 1 |
| Polymers | 4 |
| Steel production | 1 |
| Technology | 3 |