 |
| |||
| andamento a spirale; avvitamento m; ingobbatura f; svergolamento m | |||
| helical: 44 phrases in 10 subjects |
| Astronomy | 1 |
| Earth sciences | 5 |
| Electronics | 6 |
| Industry | 5 |
| Mechanic engineering | 4 |
| Medical | 8 |
| Metallurgy | 10 |
| Textile industry | 1 |
| Transport | 3 |
| Video recording | 1 |