 |
| |||
| 双螺旋 (spiralisduplex) | |||
| 双螺旋; 二重螺旋 | |||
| double spiral: 17 phrases in 11 subjects |
| Agriculture | 3 |
| Bridge construction | 1 |
| Electric machinery | 1 |
| Electronics | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Genetics | 2 |
| Metallurgy | 1 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Technology | 4 |
| Textile industry | 1 |