| |||
| 阶式 | |||
|
cascade type : 20 phrases in 9 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Chemistry | 3 |
| Electricity | 1 |
| Energy industry | 1 |
| Metallurgy | 3 |
| Plastics | 1 |
| Refrigeration | 1 |
| Technology | 7 |
| |||
| 阶式 | |||
|
cascade type : 20 phrases in 9 subjects |
| Agriculture | 2 |
| Automobiles | 1 |
| Chemistry | 3 |
| Electricity | 1 |
| Energy industry | 1 |
| Metallurgy | 3 |
| Plastics | 1 |
| Refrigeration | 1 |
| Technology | 7 |