 |
| |||
| helical | |||
| 螺旋 的 ，螺旋形的: 39 phrases in 10 subjects |
| Agriculture | 1 |
| Architecture | 3 |
| Chemistry | 1 |
| Dermatology | 1 |
| Drilling | 2 |
| General | 15 |
| Hydroelectric power stations | 2 |
| Plastics | 2 |
| Sports | 1 |
| Technology | 11 |
|
| |||
| helical | |||
| 螺旋 的 ，螺旋形的: 39 phrases in 10 subjects |
| Agriculture | 1 |
| Architecture | 3 |
| Chemistry | 1 |
| Dermatology | 1 |
| Drilling | 2 |
| General | 15 |
| Hydroelectric power stations | 2 |
| Plastics | 2 |
| Sports | 1 |
| Technology | 11 |