two-course
| rotation
| two-course | |
| hydroel.st. | 双层的 |
| rotation | |
| archer. | 轮换 |
| forestr. | 轮伐; 倒茬 |
| forestr. од. | 轮作 |
| hydroel.st. од. | 转动 |
| math. | 旋转，转作 |
| math. од. | 旋度 |
| met. | 旋光 |
| tech. од. | 旋转 |
| |||
| 双层的 | |||
| 双程的 | |||
|
two-course : 23 phrases in 8 subjects |
| Agriculture | 2 |
| Air defense | 2 |
| Animal husbandry | 1 |
| Architecture | 1 |
| Scientific | 1 |
| Space | 2 |
| Technology | 12 |
| Textile industry | 2 |